Kristina and Karissa Shannon are American glamour models, Playboy Playmates, and twin sisters. In 2008, the Shannons moved into the Playboy Mansion as two of Hugh Hefner's three new girlfriends; because of their relationship with Hefner, the Shannons began appearing on the E! network reality television series The Girls Next Door. Despite their "girlfriend" status, Karissa said the relationship she and Kristina shared with Hefner was more for fun and the opportunity to be on the show, rather than romance. The first episode they appeared in attracted 2.4 million viewers, making it the most-watched season premiere in the show's history; five weeks after the premiere, ratings had dropped to 919,000.