Rachel McAdams & Michael Sheen Split

Rachel McAdams is back on the market. The actress has ended her real-life romance with Midnight in Paris co-star Michael Sheen, a source confirms to Us Weekly.

McAdams, 34, and Sheen, 44, took their romance public in October 2010 after meeting on the naturally romantic set of Woody Allen’s film.

“Michael and I didn’t get together while we were filming Midnight in Paris, which I feel strongly about not doing when I’m working. We became quite good friends, which I think is a great way to start,” McAdams told The Sunday Telegraph’s Stella magazine in January 2012. “I felt very blessed to have made a Woody Allen film in Paris together.”

The Vow actress also shared that her most important quality in a relationship is good communication. “You need to trust each other and be able to talk to each other and be best friends.”

During her relationship with the British actor, the pair remained steadfastly devoted to making it work. “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,” she told Stella.

The Canadian star’s last serious relationship before Sheen was with her Notebook co-star Ryan Gosling. The two began dating in 2005 and were briefly engaged, but called it off in 2007. Sheen had an eight-year relationship with actress Kate Beckinsale from 1995 until 2003; the two share daughter Lily, 14.

Katy Perry And John Mayer – Off Again!

Another John Mayer relationship bites the dust again. Katy Perry reportedly called it quits with Mayer after he couldn’t settle down.

“John just can’t commit, and he kept luring Katy back with promises that he was going to change, but then he didn’t,” a source said. “Katy was pretty crazy about him, so she kept giving him another chance. John liked Katy, so he wanted to keep her in his life, but it just wasn’t up to Katy’s standards,” the source added.

What were Katy’s standards? Don’t forget, this is the girl who wrote Kelly Clarkson‘s ‘I Do Not Hook Up’ — so you better believe she wants a boyfriend, not a booty call. Unfortunately, Mayer could only offer one of those things, and it wasn’t the one she was looking for. “She needs the guy to be on board 100 percent and she was sick of John disappearing for five days at a time, then booty calling her, then straightening up and treating her well, only to go back to his old behavior a few days later.”

“Finally she was like ‘lose my number.’” Atta girl! As much as Perry loves bad boys, she only wants the ones she thinks she can tame.

This is the second time the pair have split. Previously, the ‘Queen of California’ singer dumped the ‘California Gurl’ songstress in an email – that’s cold! — but they reunited shortly after, reportedly due to Perry’s drunk texting, at a post MTV Video Music Awards date.