The unidentified representative told People magazine exclusively that Marin, 63, married the Russian-born pianist Saturday at their Malibu home in front of nearly 75 guests.
The civil ceremony between the Cheech & Chong comedian and Rubin, whose age was not reported, was officiated by Los Angeles Mayor Antonio Villaraigosa.
People magazine said Marin and Rubin have been dating for four and a half years. They became engaged in February.
Celebrity Couples of 2014 [PHOTOS]