Zac Efron is reportedly dating Maika Monroe.

The 25-year-old actor is said to have fallen for the 19-year-old actress on the set of their movie 'At Any Price' and friends say the romance is heating up.

A source told In Touch magazine: ''Zac and Maika have been spending a lot of time together at his house and are definitely hooking up.

''Zac is really into her.''

Meanwhile, Zac - who previously dated his 'High School Musical' co-star Vanessa Hudgens for almost four years until December 2010 - recently revealed he would love to meet 39-year-old supermodel and 'America's Next Top Model' judge Tyra Banks in the flesh as he has lusted after her for years.

The 'Are We Officially Dating' star said: ''I had a poster of Tyra Banks in my bedroom. She was the only girl I really had a crush on. Other than her, the rest of my posters were skateboards, BMX bikes, and Tony Hawk.''

He added: ''I hope we get to hang out soon. I haven't gotten to meet her yet.''