Michelle Monaghan has signed on to star opposite Patrick Dempsey in Columbia Pictures' romantic comedy "Made of Honor" reports Reuters.

The story chronicles the relationship between Tom (Dempsey) and Claire (Monaghan), who have been platonic friends for 10 years. He's a serial dater, while she wants marriage but hasn't found Mr. Right.

Just as Tom is starting to think that he's relationship material after all, Claire gets engaged. When she asks Tom to be her "maid" of honor, he reluctantly agrees -- only so he can attempt to stop the wedding and woo her before it's too late.

Paul Weiland will direct from a screenplay by Deborah Kaplan and Harry Elfont based on an original script by Adam Sztykiel. Shooting is scheduled to start in April.