Zac Efron is reportedly dating Lily Collins.

The Hollywood pair has been spotted sneaking out of the backdoor of the STK steakhouse in Los Angeles, having enjoyed an intimate meal together on Saturday night.

Zac - who has three big films coming out this year including 'The Paperboy', 'The Lucky One' and another as-yet untitled movie - was then seen getting into a chauffeured SUV, closely followed by the 22-year-old 'Mirror Mirror' actress.

Photographers told x17online.com: "Zac literally ran to the car and jumped in, leaving Lily behind. But Lily kept her cool and took her time. She wasn't as worried about not being seen by us. She probably didn't want to trip in her heels!"

Zac, 24, previously dated his 'High School Musical' co-star Vanessa Hudgens for four years before splitting in 2010, while Lily enjoyed a brief romance with her 'Abduction' co-star Taylor Lautner.