Justin Timberlake & Alyssa Milano
Linked since August, Timberlake, 21, and Milano, 29, stole away for some one-on-one time in a private room at the Nov. 2 launch party for his new CD, Justified. "I am so, so proud of him," Milano said that night. "My favorite song on the album is 'Señorita.' "

Ashton Kutcher & Brittany Murphy
Why wear a tie when you've got a more eye-catching accessory? At an L.A. party last month, Kutcher, 24, had Murphy, 25, wrapped around his neck. But despite the name of their upcoming movie, Just Married, neither plans to wrap anything around a ring finger yet. "We're hanging out," Kutcher says. "We're not a couple, we're a pair."

Kirsten Dunst & Jake Gyllenhaal
After Gyllenhaal, 21, lent his support to sister Maggie, 25, at the Sept. 18 premiere of her movie Secretary, she returned the favor by introducing him to her pal Dunst, 20. "They're very happy," says a friend.

Tara Reid & JC Chasez
Her rep says Reid, 27, and 'N Sync's Chasez, 26, are "just friends." But even if they're not exactly locked at the lip, they've certainly been joined at the hip all month, attending parties—like a Nov. 10 children's charity event in Santa Monica (above)—and premieres, including the Nov. 11 L.A. screening of Die Another Day.

Chris Weitz & Heather Graham
They each know their way around teen gross-out comedy (Weitz, 33, produced the American Pie movies; Graham, 32, made incest jokes in Say It Isn't So), but together they share a more grown-up side, as seen Nov. 5 at Australia's Melbourne Cup.

Jay-Z & Beyoncé Knowles
He took her to an Atlanta Waffle House after her 21st-birthday bash in August and to the Bahamas a month later. Beyoncé fiancé? "She's a lovely girl," Jay-Z, 32 (with Knowles Nov. 7 in Manhattan), told New York's Daily News. "We're just getting to know each other."