X17 reported Monday that the 28-year-old actor traveled from his home to a treatment facility in Hollywood, Calif.
"Shia was nervous. He didn't look good all morning. He was looking down and wasn't even talking to his driver. It looked like he didn't want to do it, but he knew he had to," a photographer told the gossip site.
On Thursday, LaBeouf was escorted out of a Broadway performance of Cabaret. He allegedly started yelling at the actors during the middle of the show, and was later charged with disorderly conduct and trespassing.
The former Transformers star garnered considerable attention for his erratic behavior last January, when he announced his decision to "retire from all public life." He subsequently stormed out of a press conference and organized an #IAMSORRY exhibition in Los Angeles, attributing his actions to an art project.