Longtime editor Mark Helfrich has signed on to direct his first feature, "Good Luck Chuck," for New Line Cinema. The romantic comedy is about a man who breaks up with his longtime girlfriend only to see her get engaged to the next guy she dates. The same pattern occurs with his next girlfriend and continues to repeat. He finds himself becoming a lucky charm for women who all want to date him, and a comedy of errors ensues. Mike Karz, Russell Hollander and Tracey Edmonds are producing the Josh Stolberg script. New Line executive Mark Kaufman is overseeing the project. Helfrich is best known as Brett Ratner's editor, having worked on the helmer's "Money Talks," "Rush Hour," "The Family Man," "Rush Hour 2," "Red Dragon" and "After the Sunset." Other credits include "Scary Movie," "The Last Boy Scout" and "Rambo: First Blood Part II." Helfrich is repped by CAA.