The former cop was involved in virtually every show in one capacity or another, seemingly in on the joke when he would ask audience members or even guests racy or disarming questions. He could often also be found backstage, giving tours to audience members with birthdays, or occasionally flirting with starlets roughly 1/3 his age.

Kimmel had always set up the show as a family affair, featuring not only “Uncle Frank” but “Cousin Sal” and even carving out a spot for security team member Guillermo Diaz. Surely, Kimmel will have many candidates to step in for Frank, but none will be able to replace his aloof charm and heart.