• Split: Michelle Williams, 32, and Jason Segel, 33, after a year of dating, reports People and Us. The prominent actors (she has three Oscar nominations; he stars in most of the big-budget comedies) had kept their relationship low-profile, which is to say they’d never walked a red carpet together.

McAdams and Sheen at the Cannes Film Festival in 2011. (Pascal Le Segretain/Getty Images)

Earlier: Stars, is your relationship status showing? The art of red carpet Kremlinology, 2/20/12

More Reliable Source: Kennedy house; Scott Weiland; Richard Schiff; Johnny Wright; Rock Newman; your Oscar questions