John Stamos opened up about how he really felt when his "Full House" co-stars Mary-Kate and Ashley Olsen decided not to reprise their roles in "Fuller House." The 59-year-old actor starred alongside the now 36-year-old twins for eight seasons from 1987 to 1995. He played Jesse Katsopolis, the uncle of Mary-Kate and Ashley's character Michelle Tanner. In 2016, Stamos returned for the Netflix sequel but the Olsens were the only main original cast members who never made an appearance during the revival's five season run.