The We're the Millers star and her Your Highness fiancé were joined by Ellen DeGeneres, Portia De Rossi, Demi Moore, Tobey Maguire, Ben Stiller, Lake Bell and more pals Sunday at the couple's Beverly Hills home.
A source tells E! News the party started around 6 p.m. and lasted until midnight. "People were very casual, dressed casual, and came with presents," a source added. "About 50 people came, and some brought their kids."
We couldn't be happier for the future Mr. and Mrs. Theroux! Now, anybody know how to score a wedding invite?