Jenko is a fictional character from the movie series 21 Jump Street and its sequel 22 Jump Street. He is portrayed by actor Channing Tatum and is known for his comedic personality and physical prowess. Jenko is a former high school jock who becomes an undercover police officer, working alongside his partner, Schmidt, played by Jonah Hill. In the films, Jenko and Schmidt infiltrate a high school to tackle drug-related crimes. Their humorous interactions and contrasting personalities drive the plot, showcasing themes of friendship and the challenges of adulthood. The movies blend action and comedy, appealing to a wide audience.