Who said "The lights are on but there's no one home"?

This quote is attributed to Marvin the Paranoid Android.

The lights are on but there's no one home - Marvin the Paranoid Android

"The lights are on but there's no one home"

Marvin the Paranoid Android Humor

Character in The Hitchhiker's Guide to the Galaxy

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"I am at a considerable disadvantage. I am, after all, only a simple robot."

"Life, don't talk to me about life."

"I've been talking to the ship's computer. It hates me."

"I think you ought to know I'm feeling very depressed."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."