Motherhood (2009)

Genre: Comedy
Directed by: Katherine Dieckmann
Starring: Uma Thurman, Anthony Edwards, Minnie Driver

Plot: In Manhattan, a mother of two preparing for her daughter's sixth birthday party has no idea of the challenges she's about to face in order to pull off the event.

http://www.imdb.com/title/tt1220220/
http://en.wikipedia.org/wiki/Motherhood_(film)