Hermes "Jesse" Katsopolis is a character on the sitcom Full House (1987-1995), portrayed by John Stamos. An "Elvis-obsessed" rocker and motorcycle aficionado, Jesse moved in with his brother-in-law, Danny Tanner, to help him raise his kids (Donna Jo ("D.J."), Stephanie and Michelle) after the death of Danny's wife Pamela.

Jesse’s character is much like the Fonz on Happy Days in his transformation from rebel to upstanding citizen and family man. Indeed, in his late teens and early 20s, we learn he performed numerous daring motorcycle stunts in the episode "Dr. Dare Rides Again."

The audience sees a much more rapid transformation in Jesse than in the Fonz, though. It began with how he pulled everyone together after his sister Pam’s death, according to the episode "It’s Not My Job." There were other reasons too, though. First, he met the love of his life, Rebecca, in the 2nd season, and she made him feel different than any other woman ever had. Second, he was living with three young children, and he states in one first season episode that having a family like the Tanners made him feel special, and opened up parts of him he didn’t know were there. Although he sometimes uttered things like "what has happened to my life?"(he actually moved out for a time) he loved being there, especially because of his special relationship with Michelle. One could almost consider him to be a mother figure for Michelle, even having a pet name for her; she was his "little munchkin" most of all, though he’d also lovingly call her "shorty" or "rugrat." He confided in her a lot, even when she was very young. While he never really enforced rules, he could get her to listen quite well, especially early, by just having a little talk with her.

Jesse and Rebecca have twins, Nicky and Alex.