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Tina FEY & Alec BALDWIN

"For me, a sense of humor is the easiest way to assess someone's intelligence," says Fey, 41. "There are no superdumb people who are funny on purpose. There are superdumb people who are funny and don't realize it. But if someone is funny, they have some kind of intelligence."

Alec BALDWIN & Tina FEY

"I've always had a pretty good sense of humor," says Baldwin, 54. "I try to find a way to laugh to get through some of the things we go through in life. But ever since I've been on 30 Rock, I've learned so much about what it takes to be funny. That kind of funny is like a multiple warhead. The joke keeps detonating."

Kaley CUOCO & Jim PARSONS

"I photobomb people all the time," says Cuoco, 26. "We do it on [The Big Bang Theory] set a lot. If I need to take a picture for the wardrobe department, somebody is always in the back making a face. We have a whole wall of photobombing."

Jim PARSONS & Kaley CUOCO

"I love characters who are able to have fun at each other's expense, but underneath it, they care for each other and you sense that," says Parsons, 39. "Kaley and I have that."

Matthew MORRISON & Kristin CHENOWETH

"Without laughter, I feel like there can't be a deep level of attraction," says Morrison, 33. "My girlfriend and I laugh at each other and with each other. It's good to laugh at your partner and at yourself. It feels sexy."

Kristin CHENOWETH & Matthew MORRISON

"I've always been attracted to men who are funny in life and onscreen or onstage," says Chenoweth, 43. "When you're 85 years old, the person who can make you laugh is the person you're going to want to be with. Good-looking people are a dime a dozen in this town."

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