The Place Beyond the Pines costars, who began dating in September and packed on the PDA in Paris two months later, co-star in a new Funny or Die video entitled "Drunk History Christmas."
In the hilarious video, comedian Allan McLeod drank half a bottle of whiskey before reciting the classic Christmas poem "'Twas the Night Before Christmas."
Gosling, 31, and Mendes, 37, play husband and wife in the Funny or Die skit. Ellie and AJ Culp play their daughters, while Jim Carrey, 49, portrays Santa Claus.
WARNING: The Funny or Die video contains crude language.