Greta Gerwig from 'Greenberg' joins 'Friends'

Greta Gerwig, who delivered an unbelievably awesome performance in Noah Baumbach's "Greenberg," is joining Ivan Reitman's new comedy, which was formerly titled "Friends with Benefits." The film also stars Natalie Portman, Ashton Kutcher. Kevin Kline, Ophelia Lovibond and Ben Lawson.

The film follows two friends who try and find out whether they can have a sexual relationship without falling in love. Variety says Gerwig plays a friend of Portman's character, "the first to recognize signs that Kutcher's character has become smitten with her friend." Elizabeth Meriwether wrote the script.