For those of you defending Marlon saying he wouldnt do that or that it would be out of character.
Here is a list of Marlon Brando's most notable physical altercations and aggressive on-set incidents:
Ron Galella (1973): Brando punched the famous paparazzo in Chinatown, breaking Galella's jaw and knocking out five teeth.
The "Streetcar" Stagehand (1947): During a backstage sparring match, Brando egged a stagehand into a real fight, resulting in Brando's nose being permanently broken.
Frank Sinatra (1955): Engaged in psychological warfare on the set of Guys and Dolls, deliberately ruining takes to force a nauseous Sinatra to eat cheesecake repeatedly.
Richard Harris (1962): A near-physical confrontation on Mutiny on the Bounty led to the two actors refusing to look at or speak to each other for the rest of filming after they almost came to blows.
Al Martino (1972): On the set of The Godfather, Brando unexpectedly and forcefully slapped Martino during a scene to provoke a "real" reaction of shock and fear.
Sophia Loren (1967): Subjected Loren to verbal harassment and physical intimidation on the set of A Countess from Hong Kong, leading to a heated verbal standoff.
Burt Reynolds (1972): Threatened to quit The Godfather if Reynolds was cast, using his industry power to physically and professionally bar Reynolds from the production alongside bullying him.
Val Kilmer (1996): Engaged in a legendary "clash of egos" on The Island of Dr. Moreau that involved verbal insults and several moments when the crew had to intervene to avoid them coming to blows.
Frank Oz (2001): On the set of The Score, Brando's aggression took the form of total non-compliance, including calling the director "Miss Piggy" and refusing to wear pants to sabotage wide shots.
Brando's ex-wife, Tarita Teriipaia, alleged in her memoir that he sexually abused their daughter, Cheyenne. Cheyenne's tragic life ended in suicide in 1995, a decade before Brando's death.
Actress Geraldine Page claimed Brando once bragged to her about taking the virginity of a 12-year-old and frequently pursuing 14 and 15-year-old girls during his 20s.
Source: Gemini, or just literally google it
___
I didnt even go into rumours of his sucker punches.
Notice how the only confirmed punch is by a paparazzi who is not a member of Hollywood. Thats cause Marlon allegedly would do reckless stuff to actors and people in the industry betting that they wouldnt do anything back