The 63-year-old actor spoke about his sexuality in an interview when he stated that he lives with partner Rainer Andreesen in his apartment, reported Digital Spy.
"I don't really talk about it, but everybody knows. He's going to be out here with me for the SAG Awards," he said.
The actor, who stars in the Golden Globe-winning drama 'Argo', is not the only celebrity to recently come out to the public.
Actress Jodie Foster, who accepted the Cecil B DeMille Award at Sunday night's ceremony, also spoke about her sexuality during her acceptance speech.