Adrian Grenier splits from Lucas

Entourage star Adrian Grenier has split from actress Isabel Lucas.

Grenier was reportedly unhappy that Lucas was spending time with her Transformers co-star Shia LaBeouf.

Lucas was treated at hospital after being in a car crash with LaBeouf last month.

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

They added: "It wasn't working out."

A representative for Lucas confirmed that she "is single".