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The 28-year-old actor, who was arrested in New York City last summer while being disorderly at a Broadway show, was attending the festival in support of a film he financed, "Love True" from director Alma Har'el.
According to Deadline, in the post-screening Q&A, LaBeouf was asked to describe how Har'el directs people in her films and LaBeouf compared it to an exercise he went through in rehab:
"You do this kind of operatic therapy, where you go in and sit with your small little group, three or four people, and you work through your s---. Somebody will play your father, somebody will play your mother, and there's literally like an action/cut thing and you go all the way there. For me, it's like method acting. … The only way you can actually have something like that go on is when everyone agrees that that's what the reality is. You rarely get that on a large film set."
LaBeouf and Har'el previously worked together on the music video "Fjögur píanó," by Icelandic band Sigur Rós, in which LaBeouf starred and Har'el directed.
The appearance was a rare one for the former "Transformers" star, who has stayed out of the spotlight since his arrest, though he continues to make headlines whether it be his #IAMSORRY art exhibit in January or his current hair style.
But LaBeouf is never shy, telling Variety recently about being a celebrity:
"The requirements to being a star/celebrity are namely, you must become an enslaved body. Just flesh - a commodity, and renounce all autonomous qualities in order to identify with the general law of obedience to the course of things. The star is a byproduct of the machine age, a relic of modernist ideals."
LaBeouf will next be seen in the post-apocalyptic thriller "Man Down," which hits theaters in the fall.