LOS ANGELES, Aug. 13 (UPI) -- U.S. television actor Adrian Grenier and Australian film actress Isabel Lucas have broken up, a source told People magazine.
Grenier is the star of the TV show "Entourage," while Lucas is currently working on "Transformers 2." The pair reportedly had been dating for several months.
The insider told People the celebrity couple split up about three weeks ago, shortly after Lucas was involved in a car accident, while riding in a truck driven by her "Transformers 2" co-star Shia LaBeouf.
"It wasn't working out," the source told the magazine. "Adrian saw her with Shia and that was kind of it -- the crash, their hanging out. He obviously didn't appreciate it."
Lucas's publicist confirmed to People that Lucas "is single," however, a representative for Grenier wasn't immediately available for comment, the magazine said.