By Mike Bruno
Updated July 01, 2009 at 01:58 PM EDT

Christina Applegate and Always Sunny in Philadelphia star and co-creator Charlie Day have joined Drew Barrymore and Justin Long in the New Line romantic comedy Going the Distance, according to The Hollywood Reporter. The story is about a couple (Barrymore and Long) trying to maintain a long-distance relationship. Day plays Long’s best friend while Applegate is Barrymore’s sister.