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

Don’t say Beytelgyoose three times in the mirror…

It’s even more fun to look up the origins of the name - “hand/arm of the central one”. E.g. https://en.m.wiktionary.org/wiki/Betelgeuse

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).