Jen, Courteney, Ellen, Ben, And More At Olive's Party

Sacha Baron Cohen & Isla Fisher's daughter, Olive, had a celebrity filled, cowgirl themed 1st birthday party @ her parents Bev Hills estate earlier today.

Jennifer Aniston, Courteny Cox, Ellen DeGeneres, Portia de Rossi, Ben Stiller, Kate Beckinsale, Tobey Maguire, Jack Black, and Seth Rogan to name a few, were all in attendance to help little Olive celebrate her big day.

Not a lot of pictures have surfaced yet. The only ones have been of JA. I'm guessing she was there because Cohen used to rent her Hollywood Hills home during her marriage to Brad Pitt. And they've stayed friends?