Two years before Brando declined his Oscar for Best Actor in The Godfather (1972), he'd applied to the Academy to replace the one he'd won for On the Waterfront (1954), which had been stolen. Prior to its theft, Brando had been using the Oscar as a doorstop.
Expelled from high school for riding a motorcycle through the halls.
He reputedly suggested that his cameo role as Jor-El in Superman (1978) be done by him in voiceover only, with the character's image onscreen being a glowing, levitating green bagel. Unsure if Brando was joking or not, the film's producers formally rejected the suggestion.
His signature was considered so valuable to collectors, that many personal checks he wrote were never cashed because his signature was usually worth more than the amount on the check.
Appeared on the front sleeve of The Beatles' classic album "Sgt. Pepper's Lonely Hearts Club Band"
During Mutiny on the Bounty (1962) costumer James Taylor claimed that Brando split the seat on 52 pairs of pants during the shooting of the film, necessitating that stretch fabric be sewn into his replacement duds. He split those, too. Ice cream was the culprit.
Refused to wear pants on the set of The Score, so all his scenes had to be filmed from the waist up.