Grey's Anatomy's Patrick Dempsey In Wonderful Tonight image

Dempsey (FayesVision/

New flick!

Actor Patrick Dempsey, who plays Dr. Derek 'McDreamy' Shepherd on "Grey's Anatomy," has signed on to appear in the upcoming big screen film, "Wonderful Tonight," according to the Chicago Tribune. Amanda Seyfried ("Dear John," "Mama Mia") will co-star in the Myriad Pictures romantic comedy that will tell the tale of a wealthy bachelor (Dempsey) whose one night stand with a free-spirited young woman (Seyfried) results in them having a child together. The bachelor ends up on a quest to prove himself as a partner and father.

Read the latest on another "Grey's Anatomy" cast member's film project through Sara Ramirez in Sofia the First.

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- Candace Young