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Official Site: Fox

Lenford "Lenny" Leonard and Carlton "Carl" Carlson are supporting characters in the Fox animated series The Simpsons, and are voiced by Harry Shearer and Hank Azaria. They have a close relationship with each other with hints of homosexuality. Both work at the Springfield Nuclear Power Plant and possess a master's degree in nuclear physics, but are often portrayed as blue-collar working men.

Lenny and Carl are sixth on IGN's Top 25 Simpsons Peripheral Characters.

Lenny is voiced by Harry Shearer. He is friends with Carl and Homer Simpson. He works at the Springfield Nuclear Power Plant and possesses a master's degree in nuclear physics, but he is often portrayed as a blue-collar working man.

Despite being shown in the First Church of Springfield, Lenny is a Buddhist — making him, Carl, and Lisa the only three Buddhists in Springfield. Born in Chicago, he is also a war hero and a three-time juror. His grandmother spent 20 years in a Soviet labor camp, hinting that Lenny may have ancestors from the former Soviet Union, or have ancestors who were POWs. During one episode, he is shown to be an adept guitar player. "Homer the Great" reveals Lenny was member number 12 of the Springfield chapter of the Stonecutters secret society. In the episode "Half-Decent Proposal", Lenny is shown to have little regard for his own life: "Quick and pointless, that's the death for me." Another example of his apathy towards salvation is that he shrugs after being pulled from a ladder which would have seen him and Homer to safety. Excluding unnamed background characters, Lenny is one of the few Springfield residents to persistently resist the lure of the Movementarians. Lenny is a member of the Republican Party, as indicated in "Bart-Mangled Banner" (2004) when he reveals his Dole/Kemp '96 American flag tattoo. He is also shown to be a member of the NRA as seen in "The Cartridge Family". His weapon of choice appears to be an AR-15 rifle, which he says "are manufactured for a reason: to take out today's modern super animals like the flying squirrel, and the electric eel."

Carl Carlson has not been a contender in any CBUB matches.