Uh oh, it appears that Shia LaBeouf may be going a little Lindsay Lohan on us. The actor seems to be on a downward spiral after being accused of plagiarizing his newest film. And when he apologized for that plagiarizing, he was accused of plagiarizing that apology.

Shia LaBeoufShia LaBeouf appears at the Cannes Film Festival

Since then, he has acted out, in public and on Twitter, and now he was reportedly in a pub fight in London.

According to the New York Daily News, LaBeouf was caught on video head-butting another man at a pub in South London. TMZ reportedly obtained the video.

"What'd you say about my girl's mom?" LaBeouf reportedly screamed at the man. "Are you f-----g kidding me bro?"

The actor then head-butted the man, while two women try to hold him back.

"Don't be sarcastic with us again," a British woman told the man after LaBeouf is pulled off him. "Don't even play smart."

According to both TMZ and the NY Daily News, it's not clear what the man actually said to the Transformers star.

Shia LabeoufShia LaBeouf with Guy Pearce at the premiere of 'Lawless'

The pub fight isn't a first for LaBeouf — in fact, it's not even a first in that same bar. He was reportedly in another brawl in the same location back in 2012.

On Monday, a few days before the fight, he tweeted, "I AM NOT FAMOUS ANYMORE." The tweet may have come from Jim Carrey's criticism of him at Sunday's Golden Globes.

"Dying is easy, comedy is hard," Carrey said. "I believe it was Shia LaBeouf who said that. So young, so wise."