VIDEO : Scarlett Johansson & 'SNL' Boyfriend Colin Jost Make Their First Public Appearance

Actress Scarlett Johansson and Comedian Colin Jost made their debut as a couple on Thursday night in New York. The new couple attended the American Museum of Natural History Gala and they posed for photographers, which officially confirmed their relationship status. The "Avengers" actress, looked gorgeous in a red vintage Yves Saint Laurent gown and the "Saturday Night Live" star looked dapper in a black tuxedo. Rumors began to swirl back in May when Scarlett and Colin were spotted on their way to the "SNL" season finale party.