No matter, Efron sticks by her even as false reports swirl that Disney will drop her from is released.
The couple first met on the set of High School Musical and began dating back in 2005 for 5 years before calling time on their relationship.
“I went through a phase when I was really mean because I was so fed up.
February 2009: Not only do the lovebirds hit the red carpet at the Oscars, they perform during the big show alongside Hugh Jackman and Beyoncé, among others. November 2010: Efron visits Hudgens in Hawaii, where she's filming .
August 2009: Again, Hudgens is left red-faced when more topless pics are leaked on the web. Despite reports they broke up during the trip, they're spotted engaging in some major PDA, including hugs and plenty of smooching. 11, 2010: Just Jared posts pic of Efron hanging with fellow hunkster, . 13, 2010: Sources exclusively confirm that the two have split.
The duo play on-screen lovers Summer and Brody in their upcoming film.
Romance rumors were first reported by gossip site Hollywood Life, with a source claiming the pair have been secretly dating for months.
The source said they had instant chemistry on set and Zac was attracted to his co-star because he thinks she is more 'mature and sophisticated' than the other women he's been with.
Earlier this month, Neighbors star Zac fueled dating speculation when he kissed the brunette beauty at the MTV Movie & TV Awards.
Girls were running after him, and I was giving them death stares.