<Li> "Life on the Fast Lane" (Lenny) </Li> <Li> "Homer's Night Out" (Carl) </Li> <P> Lenford "Lenny" Leonard (or Leonard "Lenny" Lenford) and Carlton "Carl" Carlson are two supporting characters in the Fox animated series The Simpsons, voiced by Harry Shearer and Hank Azaria, respectively . They are best friends of Homer Simpson and work with him at the Springfield Nuclear Power Plant . Lenny and Carl are rarely seen apart and have a close relationship . Each possesses a master's degree in nuclear physics, but are often portrayed as blue - collar working men . </P> <P> Lenny is voiced by Harry Shearer . He is friends with Carl, Moe Szyslak, Barney Gumble 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 . </P>

Who does the voice of lenny and carl
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