No, . While they have a long, complicated history as co-stars and enemies, they are not related by blood.
Cecil’s lifelong dream was to be Krusty’s sidekick. However, during Cecil's audition, Krusty was unimpressed but instantly hired Bob—who was only there to support his brother—because he thought Bob's large feet and high-brow attitude made him a perfect "comic foil". is sideshow bob krusty's brother
but hired Bob on the spot after being amused by Bob's "palm tree" hair. In a nod to the sitcom Frasier , Bob is voiced by Kelsey Grammer and is voiced by his TV brother, David Hyde Pierce. : Krusty has a maternal half-brother named Luke Perry (played by the actor of the same name). Luke Perry However, during Cecil's audition, Krusty was unimpressed but
Their relationship ended when Bob framed Krusty for armed robbery (an act that landed Krusty in prison) in the episode “Krusty Gets Busted” (Season 1, Episode 12). After that, Bob’s true, homicidal nature was revealed, and he became one of Bart Simpson’s most persistent archenemies. : Krusty has a maternal half-brother named Luke