Rafferty teamed the smart blazer and matching trousers with a black open collar shirt as he posed for photos at the bash ... Rafferty Law, Darragh Cowley and German actor Louis Hofmann.

Ripley, which came out in 1999. "I look back on that film now, it's strange to think it was 25 years ago," Law recently told PEOPLE. "My eldest son Rafferty is 27, and I wasn't much older than he is.