Christopher Walken, Alan Arkin, Julianna Margulies and Al Pacino
12/09/2012 at 11:00 AM EST
It was an A-list party for the A-listers!
On Sunday night, Al Pacino, Christopher Walken, Alan Arkin
and Julianna Margulies
celebrated their new film Stand Up Guys
at The Oak Room in New York's Plaza Hotel.
"Al Pacino chatted with Christopher Walken, Alan Arkin and director Fisher Stevens as they sipped on cocktails," an onlooker tells PEOPLE.
It was a star-studded affair as Ben Stiller, Liev Schreiber
, Matt Dillion, Jeremy Piven, Mariska Hargitay, Jon Bon Jovi, Alan Cumming, Girls
' Zosia Mamet and Boardwalk Empire
's Bobby Cannavale were all also in attendance.
After the screening at the Museum of Modern Art ended, guests enjoyed Appleton Estate cocktails, small bites of lobster claw, salmon tartar, mushroom crostinis and shrimp cocktails.
– Melody Chiu