10 Simpsons Voice Performances That COMPLETELY Changed

10. Lenny Leonard & Carl Carlson

All the other entries here are single characters, but with Lenny and Carl it just makes sense to have them together. Not only because the characters are seemingly inseparable on screen, but because their voices are intrinsically linked.

The reason for this double whammy is because when Lenny first appeared, he had what’s now Carl’s voice, and vice versa. Lenny first appeared in Life On The Fast Lane, the ninth episode of the show, while Carl appeared one episode later in Homer’s Night Out.

This voice switching continues throughout the first two seasons, although occasionally the characters both use what is now Lenny’s voice. Brush With Greatness, the 18th episode of Season Two is the final time Carl has substantial lines with Lenny’s voice.

By Season Three, both characters have their correct voices and are finally paired up regularly. What’s especially strange about this is that Lenny and Carl are voiced by different people, Harry Shearer and Hank Azaria respectively. This means that rather than one actor flipping between voices, there was a conscious decision to switch the two voices over.

Thirty years later, it’s clear that was for the best.