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Nick & Drew Lachey

Nick (left) and Drew Lachey, who, with Justin Jeffre and Jeff Timmons, compose the vocal group 98°, "have always been close," says Nick, 26. "We've always kind of leaned on each other." The Cincinnati-bred duo, whose album 98° and Rising went double platinum last month, have become even tighter since taking up life on a tour bus. Says Drew, 23: "For the past four years we've pretty much spent every waking moment together"—including some spent in an Atlanta tattoo parlor in 1996.

Drew: We both got armbands. I was in more pain because mine's a little bigger.

Nick: We're very competitive. The only reason we even went to the same school [Cincinnati's School for Creative and Performing Arts] was because my whole family was bragging and talking about how proud they were of Drew for getting in. Blah, blah, blah. I got sick of hearing about it. So I went down and auditioned too. I had no intention of going. I just wanted to prove I could get in.

Drew: He had to steal my thunder.

Nick: In high school, I had a girlfriend pretty much the entire time until senior year. Then I started dating other people. Drew and I had a couple of mutual girlfriends, actually. One that we quarreled over a bit.

Drew: Nick went away to college [Miami University of Ohio]. I went a different route. I joined the Army in the summer of '94 after I graduated high school. I just did the Reserves, so I did basic training and medic training.

Nick: He was far more responsible when he came back.

Drew: I wish I had Nick's height. I grew up playing basketball with him so I'm used to being the short man on the court.

Nick: I wish I had his hook shot—he mastered that to make up for the height thing.

Drew: Every younger brother looks up to his older brother. I would look to Nick for his style.... Well, I didn't really look up to him for his style.

Nick: Yeah, like you have any!

Jerry & Charlie O'Connell

Since they slept on matching Popeye sheets in their family's Manhattan home, actors Jerry (standing) and Charlie O'Connell have been inseparable. When Jerry, 25 (Scream 2, Body Shots), landed his first acting break at age 11 in 1986's Stand by Me, Charlie, then 10, spent the summer with him on location in Oregon. And after moving in 1996 to Hollywood, where they share an apartment, they worked side by side on TV's Sliders and even double-dated—with a pair of sisters. "It was crazy," recalls Charlie, 24. "He broke up with the younger sister, and then all I would hear about was what a jerk my brother was." Needless to say, it didn't last.

Charlie: At home we had beds right next to each other.

Jerry: Like, a foot apart. Every night it was "Hey, Charlie." "Yeah?" "You asleep?" "No. You?" "No." "Cool." "Good night." And in L.A., now that we live together, it's kind of like the same thing again, except that we have our own rooms.

Charlie: My fencing trophies would keep him up at night because of the gleam.

Jerry: When we were younger, I was not as athletic as my brother, but I came into my own. I'm pretty athletic now.

Charlie: Jerry liked to wrestle when the parents were around because then they could get me off of him.

Jerry: We'd draw imaginary lines down the backseat of the car.

Charlie: Like on The Brady Bunch, where they separated the room...

Jerry: We never fought a lot, though.

Charlie: We'd argue with each other up until we got out of the car for summer camp, and then it was "Nobody insults my brother!"

Jerry: Yeah. We looked out for each other. It was sort of like we were a team.... Girls really weren't an issue.

Charlie: I think I was a late bloomer with girls.

Jerry: College, college for you.

Charlie: High school, I think, actually. Thank you, Jerry.

Jerry: We'll go on dates together most of the time.

Charlie: I would never go out with someone who dated my brother, though. Forget it.

Jerry: One time in high school you made out with Megan I-forget-her-last-name when I was a junior. I was kind of going for her, and you made out with her. And I was genuinely excited for you. Better you than someone else.

Charlie: I find my girls to be more fun than his [laughs]. They like to go out and have a much better time. The girls that Jerry goes out with are more quiet.

Jerry: Charlie is very much the strong, silent type. He has the ability to go to a party or to a bar and stand in the corner and not say anything. I have more of a tendency to yap.

Charlie: When something amuses me, I'll go off, but I am quiet.

Jerry: We talk to each other every day, sometimes for two minutes, sometimes for two hours. I could be in bed at 2 a.m. and say, "Charlie, are you asleep?" "No." "Great, I'll meet you in the living room."

Charlie: We give each other advice about everything.

Jerry: Occasionally we'll get into a tiff over something like laundry. I like everything to be neat where we live. Charlie couldn't care less.

Charlie: Dude, the house is immaculate now.

Jerry: No, it's not. It's not that I'm this little prissy guy running around the house dusting after people. I just like to have some sense of organization. He's such a slob.

Charlie: The place is immaculate!

Jerry: By the way, we wear all the same clothes. We wear the same sizes, and we buy things together.

Charlie: When he leaves, I'll come across a couple of things missing. But we do share everything.

Jerry: Moving out to L.A. together really helped. You want to be accepted in this scary town. But to have my brother here was like, "Who cares? This is great."

Michael & Kevin Bacon

Actor Kevin Bacon, 41 (right), and his brother Michael, 50, an Emmy Award-winning composer, have made music together for 30 years but took their act public only five years ago, at a club in their hometown, Philadelphia. Now they tour as the Bacon Brothers, and their second acoustic rock CD, Getting There, was issued in September. Both married with kids—Kevin wed actress Kyra Sedgwick in 1988, and Michael has been married 27 years to Betsy, his production manager—the two are closer now than they were growing up with four other siblings. But each has always kept an eye on the other's achievements.

Michael: Sure I'm jealous. He's a movie star and makes 8 zillion dollars a day.

Kevin: I'm jealous of his musicianship. I'd love to wake up one day and be able to play like he can. When we put the band together, he said, "You are going to play the guitar." I said, "You are out of your mind." I thought I was going to stand there and sing and play the tambourine like Betty and Veronica.

Michael: He's not lazy anymore. He works really hard at it.

Kevin: Playing and singing your own songs in front of people to me is the scariest thing.

Michael: I get less nervous because I've been doing it longer.

Kevin: He's a great creative force and probably the biggest influence on me—certainly musically, and in terms of values.

Michael: He's a great father—I think that's something we share as a main priority.

Kevin: We have the same taste in women.

Michael: I'd marry his wife.

Kevin: And I'd marry his. We like them slim.

Michael: Yeah. They are both skinny as hell.

Kevin: When I was young, I wanted to date some of his women, damn right. Girls loved Michael. His hair was long and curly, and he sang these sensitive songs. I used to go to coffeehouses where he was playing, and the chicks were just dying.

Michael: Kevin is much sexier than I am. And much more fashion-obsessed.

Kevin: I'm just vainer, I think. I'm an actor.

Richard & Jonathan Jackson

They share a bedroom in their parents' L.A. home and a vocation. But actor brothers Richard (Saved by the Bell: The New Class,) Jackson, 20, and 17-year-old Jonathan (General Hospital, The Deep End of the Ocean) limit rivalry to the important stuff, like their Sony PlayStation video games. "Lately we've been dealing with Madden football," reports Richard (left). "We used to throw the paddles at each other, but now we're like tennis players—'good game.' " They keep things civil on the romantic front as well.

Jonathan: We don't really go after the same women. I find myself attracted to women with dark hair and blue eyes.

Richard: I used to go for the blonde-hair types, but now I've branched out. I really don't have a type anymore.

Jonathan: If there is a girl we're both interested in, we weather that storm right away; we figure it out.

Richard: Like who saw her first, who does she look most interested in.

Jonathan: Once in a while Richard has a sheepish Michael J. Fox thing going around women. They like that.

Richard: Jon is very quiet and intense. Women are attracted to the mystique—and his blue eyes.

Jonathan: When one of us gets a great girl, the other is happy. If I was recommending Richard to a girl, I'd say, 'You won't find anyone who will treat you better.' "

Richard: Ah, that's very nice.

Jonathan: Except me, of course.

Scott & Dean Winters

Whether battling bullies in high school or audition angst in Hollywood, actors Dean Winters (right), 35, and brother Scott, 34, never go it alone. "If you got one of us, you got both of us," declares Dean. So their ongoing incarceration as the O'Reilly brothers in HBO's critically lauded prison drama Oz "is pretty ideal," says Scott. And while the native New Yorkers, both of whom are single, also work apart—Dean, who lives in Manhattan, moonlights at NBC's Law & Order: Special Victims Unit; Scott, who lives in Three Rivers, Calif., is taping a UPN series to be called The Beat—they still watch each other's backs. Says Dean: "I wouldn't want to be in this business alone."

Dean: Growing up, I was a year and two weeks older, but Scott was the levelheaded one. I tend to leap before I look. He tends to be more cerebral and has this inner stillness that I wish I had. He's like the Dalai Lama.

Scott: I envy his courage. And people love to be around him because he's a great personality. I've never had a female friend he hasn't gotten along famously with.

Dean: If I was a woman, I'd think Scott was sexy, definitely. He has a way about him that is kind of soft, a Barry White thing.

Scott: Barry White? Put another log on the fire. Dean was the cool one growing up.

Dean: We both started dating when we were in junior high. I'd date a girl two or three months.

Scott: I was a long-termer. I'd have girlfriends for a couple of years.

Dean: The only time we dated the same woman was when I was 14. I was dating Jenny Smith, and then we broke up, and Scott took her to the prom.

Scott: Did I? Man...no class!

Nicky & Kelly Brendon

Twenty-eight years ago, Nicky Brendon (left), Xander Harris on Buffy the Vampire Slayer, made his debut three minutes after his identical twin, Kelly, in a Los Angeles hospital. These days, Kelly, who spent the past five years working in film and TV production, is following Nicky—into acting. But the pair, who share a two-bedroom L.A. apartment, occasionally part company.

Kelly: I'm the neat one.

Nicky: He's not neat. He used to be really, really neat, but he's let himself go a little bit.

Kelly: I'm the clotheshorse. He borrows more of mine than I borrow of his.

Nicky: Are you insane?

Kelly: I just steal your clothes and don't return them.

Nicky: Hands down, Kelly steals more clothes. He also works out more. I go to the gym because I really enjoy it. Kelly goes because he feels he needs it.

Kelly: I have to become one notch more beautiful.

Nicky: I wake up and it's like, "Oh, God, I hope I look that pretty."

Kelly: As we get older, we're starting to look different. Even our faces are changing a little bit.

Nicky: And I started growing my hair out.

Kelly: People still mistake me for Nick. If a little kid comes up, I say, "yeah." If an adult comes up and asks me if I'm the guy on Buffy, then I say, "No, we're twins." They say "Oh, sure, you're twins." Once, people did throw french fries and napkins at me when they didn't believe me.

Nicky: Kelly goes out too much. [Laughs]

Kelly: He pays me $200 a week to sign autographs.

Damon, Marlon, Keenen & Shawn Wayans

Raised in New York City by salesman Howell Wayans and his homemaker wife, Elvira—who have six other children as well—Wayans brothers (from left) Damon, 39, Marlon, 27, Keenen, 41, and Shawn, 28, first quipped their way to fame in 1990 while working together on what turned into the family's de facto comedy show, FOX's In Living Color. Since then they have each moved on to separate film, TV and stage projects. And while Damon and Keenen are also busy raising their own kids, the quartet, who all live in L.A., still often come together for sizzling sessions of mutual support, friendly dissing and comedic one-upmanship. "We always keep a lookout for each other," says Shawn.

Keenen: At home, we all had our turn to be the baby except Shawn [Marlon was born 18 months after him].

Marlon: Yes he did!

Keenen: Yeah, but you stole the spotlight from him when you came along. I was my mother's favorite, but not because I was the baby. I was the favorite because I was the most reliable.

Shawn: He was the assistant parent.

Damon: Keenen and [their actress sister] Kim were the favorites because they got good grades in school, and they didn't get in fights unless they had to.

Keenen: Marlon and Damon are more alike. They're more gregarious, more comedic. Shawn and I play the straighter guys.

Marlon: The thing we all possess is a huge amount of discipline. Keenen taught us discipline, and working on In Living Color taught us discipline. We all have a hard-work ethic.

Shawn: I admire Keenen's strength. When I think of Keenen, I think of that arm on the baking soda box. To me, he's that arm. He's strong.

Keenen: You know what I admire about Shawn? He listens. He's a thinker.

Damon: I admire Marlon's charisma, his strength, his discipline and will.

Marlon: We all play on all of our strengths.

Keenen: Something Marlon did when he was about 7 or 8 set the tone for how we all deal with each other. He said to me "I really admire Damon, 'cause he's a guy and he said he loves me." Since that time we always say "I love you" to each other.

Marlon: In school, Shawn used to save me all the time. I would punch somebody and then run.

Shawn: Ten seconds later, I'd hear, "Shaaawn!" and see the biggest kid chasing him. I had to go be the big brother.

Keenen: We were all class clowns.

Damon: I would walk in, and everyone would say, "Do something stupid!"

Keenen: If I would miss a day, I would get a round of applause when I came back. Everyone was like, "Entertainment is back!"

Marlon: I was a good student. I had a 97 average.

Damon: In what, lunch?

Keenen: Damon and Shawn are the most stylish dressers.

Damon: Keenen is color-blind.

Keenen: I gotta ask people what to wear.

Marlon: I dress like a rich thug. Damon's got more of the snazz. We call Shawn "Floyd," because he's a pretty boy. He likes stuff fitted.

Keenen: We're competitive but only in practical jokes. If I do something to one of my brothers, they never get mad—they get even. We never compete over a girl. We all have the same girl in different shapes and sizes, because we're all attracted to the same qualities. We like women who are fit, funny and smart.

Damon: If not funny, at least ones who laugh at my jokes.

Keenen: Comedy neutralizes everything. We don't really talk about heartache. I don't think any of us have been in a situation where we pined over someone, where we were devastated. But that doesn't mean we haven't loved.

Marlon: Keenen taught us everything there was to know about sex. He taught Shawn and me how to kiss a girl by demonstrating on a grape when I was 12.

Keenen: The two of them and their two best friends were sitting there on the bed, and I was explaining about sex.

Marlon: I thought the moral of the story was you gotta eat more grapes.

Damon: When I do a love scene in a movie, I just rely on my partner. Guys don't talk about that stuff with each other. We don't go, "Man, I'm nervous—I'm going to do a love scene."

Keenen: We bring a few grapes and we're set.