The clip is a recording of a panel discussion at the 2011 San Diego Comic-Con convention, when Momoa joked that he loved working on sci-fi and fantasy projects because he got to "rape handsome women".
Jason Momoa is taking heat on Twitter for a joke he made in 2011 about rape.
Game of Thrones has been constantly criticised for its portrayal of rape throughout the series.
The latest actor to be spotlighted is 38-year-old Momoa, who in addition to "Game of Thrones" fame is starring in the upcoming "Aquaman". His co-star, Ben Affleck, has also come under fire recently after footage emerged of him groping TV star Hilarie Burton in 2003.
"It's just there's so many things that you can do like rip someone's tongue out of their throat, and get away with it, and rape handsome women, you know?" he said, prompting laughter from the crowd and mixed reactions from his fellow cast members sitting beside him.
Thanks to the understandable outrage over long-hidden sexual allegations involving movie mogul Harvey Weinstein, male stars face having any embarrassing skeletons being pulled out of their proverbial closets and posted on social media. I love her, but I'm hurting her and she's crying. Emilia Clarke, the actress who plays the character that Momoa's character rapes on the show, did both. I'm not a rapist! It is unacceptable and I sincerely apologize with a heavy heart for the words I said.