Judy Greer is a versatile actress known for playing quirky best frineds to female lead characters in the movies, kind of like a wacky Carrie Fisher. :-)
In addition to supporting roles in movies like The Wedding Planner and 13 Going On 30, Ms. Greer has played one-shot characters in numerous sitcoms.
Alas, she's been less successful with starring television roles. Her two most recents efforts as of this posting date, ABC's "Miss Guided" from 2008 and CBS's "Mad Love" from 2011, didn't make it.