Marc Anthony is separating from his wife of 2 years ... and the news comes hours after he and Jennifer Lopez shared a very public kiss.
Marc and Shannon De Lima reportedly broke up sometime recently. They got married back in 2014, and have no children together.
During Thursday night's Latin Grammys J Lo presented Marc with an award and then they kissed on the lips. However, J Lo's manager, Benny Medina, tells us ... they are "absolutely, categorically, 100% not back together."
Shannon and Marc were last seen together publicly at his Madison Square Garden concert in August. Ironically, J Lo was also there that night and performed a duet with Marc -- but again, we're told it's nothing romantic, just music.