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When I read Hitchhiker's Guide, I pronounced it b'tell-jew-EEss

There's a thought that:

Never make fun of people for mispronouncing a word. It means they learned it by reading

Best I understand, this is a quote without a known attribution

colloquially it might be beetlejuice, but traditionally it's more like betelgyse or betelgoosa

My dad was an astronomer, and as a toddler I thought it was the funniest name for a star. Then the movie came out and I was bugged that they misspelled the name for the promotional posters (but not in the movie itself).