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Adrian Grenier and Isabel Lucas

Entourage star Adrian Grenier and Transformers 2 actress Isabel Lucas have ended their relationship. Isabel, as many gossip fans know, was Shia LaBeouf's passenger the night he was arrested for suspicion of DUI after crashing his truck. "It wasn't working out," a source told People.com, of the couple who had been dating since the spring. "Adrian saw her with Shia and that was kind of it – the crash, their hanging out. He obviously didn't appreciate it." We're sure Adrian will be okay. After all, he has Turtle, E and Drama to help him through the breakup.

• Filed Under:
• Adrian Grenier,
• Celebrity Breakups,
• Isabel Lucas,