Caitlin Crosby and Zachary Levi'Chuck' fans, rejoice! Zachary Levi is a single man. The TV star broke up with singer Caitlin Crosby after a two-year-relationship, Usmagazine.com reports.

"He broke up with her on Saturday after his big NBC premiere aired,"a friend of the actor tells Us.

"He told her it was bad timing and if God brings them together in the future it's meant to be," the friend adds of the split. "Guess he thinks he's too big a 'star' now. No more Mr. Nice Guy."

Caitlin is upset over the breakup. "She is heartbroken, but she is already writing great songs about it."