After barely a year of dating, Michelle Williams and Jason Segel have reportedly split. The couple went public with their relationship in April at an afterparty for the actor's romantic comedy "The Five-Year Engagement."

Williams recently told InStyle magazine: "He is nice... I didn't actually realize who he was before I started dating him... I didn't realize he made a lot of very popular, funny movies."

The pair recently vacationed in Cancun, Mexico, with Busy Phillips and her family; however, the couple struggled to maintain a long-distance relationship, according to Williams lives in New York City with her daughter Matilda while Segel is based in Los Angeles.

In other relationship news, Rachel McAdams and Michael Sheen have also broken up. The couple went public with their romance in October 2010 after getting together on the set of Wood Allen film "Midnight in Paris."

According to Us Weekly, the couple are no longer together.

Last year McAdams told The Sunday Telegraph's Stella magazine, "Michael and I never spend more than three weeks apart - we rack up a lot of air miles - but you have to be quite adaptable in this business whether you are in a relationship or not."

The actress was once engaged to Ryan Gosling, while Sheen had an eight-year relationship with Kate Beckinsale and is the father of their daughter Lily.