"Jen had a party at her Beverly Hills house Friday night– a little going away party since she plans on spending so much more time in New York," a source tells PEOPLE.
"She just wanted to have one more great get together with friends at the house before she moved out," adds the source.
Her boyfriend Justin Theroux, who is about to celebrate his birthday,was also in attendance at the home, which was once featured in Architectural Digest.
The couple recently went house hunting in Los Angeles but have yet to decide on a new residence.
