Alex Kof (born Sergey Olehovych Motsar in born February 4, 1982) is a Ukrainian pornographic actor, model and independent content creator. He began his adult film career in Moscow in 2013 after meeting filmmaker Michael Lucas, before taking an extended break from the industry. Kof later left Russia and relocated to New York City, where he resumed performing and began producing his own content. He has since appeared in productions for studios including CockyBoys, Falcon Studios, NakedSword and Treasure Island Media. In 2026, Kof received a GayVN Award for his performance in the CockyBoys featurette "Just Say Yes".