No surprise here, Jenn's bestie, Courtney Cox, and her mystery man friend showed up!
Not to mention her other BFF, Chelsea Handler, came to hang.
One of our favorites, Kathryn Hahn, looked a little less excited about the photographers in the driveway.
Oh, hi, Tobey Maguire. Fancy seeing you here.
Does Will Arnett have a new lady friend that looks exactly like Jennifer Aniston? Quite possibly.
NBD, Robert Downey, Jr. joined in on the festivities.
Wonder if it's weird that Gwyneth Paltrow dated Brad Pitt before Jennifer did?
