The project saw LaBeouf live in a gallery for five days, sitting silently during opening hours with a paper bag over his head that said 'I AM NOT FAMOUS ANYMORE'.
After copping backlash from controversial TV host Piers Morgan, who branded the allegations as a 'cheap PR exercise', LaBeouf's two collaborators, Luke Turner and Nastja Säde Rönkkö have taken to Twitter to back the actor's claims.
The pair clarified that they didn't give people free reign with LaBeouf, and that they "intervened" when they realised what was going on.
The rape allegations came to light late last week when an interview with Dazed magazine was released.
"One woman came with her boyfriend, who was outside the door when this happened, whipped my legs for 10 minutes and then stripped my clothing and proceeded to rape me," LaBeouf wrote.
"There were hundreds of people in line when she walked out with dishevelled hair and smudged lipstick. It was no good, not just for me but her man as well. On top of that my girl was in line to see me, because it was Valentine’s Day and I was living in the gallery for the duration of the event – we were separated for five days, no communication.
"So it really hurt her as well, as I guess the news of it travelled through the line. When she came in she asked for an explanation, and I couldn't speak, so we both sat with this unexplained trauma silently. It was painful."