Adrian Grenier & Isabel Lucas Put Brakes On Relationship

LOS ANGELES, Calif. -- "Entourage" star Adrian Grenier and girlfriend Isabel Lucas have called it quits, People reported.

Adrian reportedly put the brakes on the relationship three weeks ago, just after Isabel was involved in a car accident with "Transformers: Revenge of the Fallen" co-star Shia LaBeouf.

"It wasn't working out," a source told People. "Adrian saw her with Shia and that was kind of it - the crash, their hanging out. He obviously didn't appreciate it."

[ Shia LeBoeuf Eyewitness Talks Car Crash (July 28, 2008) - Play it Now ]

The couple had reportedly dated for several months.

Meanwhile, the co-stars were spotted hanging out in Los Angeles on Monday, where Shia, who injured his left hand in the accident, had trouble opening a bottled drink.

As previously reported on AccessHollywood.com, Isabel was Shia's passenger in a collision with another vehicle in Hollywood on July 27. The crash saw his green Ford truck flip over, crushing his hand.

[ All Access: Shia LaBeouf - Break-Ups - Celebrities ]

Isabel, who was taken to the hospital with Shia and treated for minor bumps and bruises following the accident, told Access Hollywood recently that her co-star is getting better following his hand surgery.

"His hand is healing well," she told Access.

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