After two years of dating, Renee Zellweger and Bradley Cooper have called it quits. Sources close to the couple tell PEOPLE that the high wattage Hollywood couple have broken up.

Zellweger, 41, and Cooper, 36, began dating two years ago and moved in together last fall. They met six years ago on the set of film 'Case 39' but only started dating in 2009.

Their reps have no comment on the reported split.

Earlier this week, Cooper stopped by Howard Stern's Sirius XM radio show where he discussed his marriage to Jennifer Esposito and his overall feelings on marriage.

"It was just something that happened," Cooper said about his quick marriage [via UsMagazine.com]. "The good thing is, we both realized it ... Sometimes you just realize it. It just wasn't right. It's interesting ... things happen!"