Are Zac Efron and Halston Sage dating?

Zac Efron, Seth Rogen, Rose Bryne and Halston Sage's new upcoming movie "Neighbors" will be released on 9th May 2014, Movie is directed by Nicholas Stoller.

There is been rumored of "Zac Efron" dating with his co-stat "Halston Sage. He told Access Hollywood about working Halston "It was fun,She’s really sweet. She’s a sweetheart, Did you talk to her? What did she say about me?

Halston Sage told  Access Hollywood "It was great, he’s a really talented actor, so he made it easy. Everyone… We all stay in touch, It’s so good, that’s why we’re so excited to be here because we all got so close over filming.”