The stars were joined at the IWC hosted event by model Karolina Kurkova, Justin Long, Jack Huston, Mira Sorvino (with husband Christopher Backus), and festival founder Robert De Niro (with wife Grace Hightower).
Penn will be showing off his latest film Greetings from Tim Buckley at the festival this week.
FYI: Olivia is wearing an A.L.C dress and Tabitha Simmons heels with a Cecelia clutch and House of Lavande vintage earrings. Karolina is wearing the Reece Hudson Bondage Minaudière and Kalan 14K white sapphire studs.
20+ pictures inside of Olivia Wilde and others at the event… More Here! »