Is Zac Efron Dating Halston Sage?

Is Zac Efron dating his former co-star Halston Sage?

A new report has emerged saying the 2014 Neighbors co-stars are an item and in love!

The 32-year-old actor and 26-year-old Prodigal Son actress “are in a serious relationship and in love,” a source told Us Weekly. “They spent the holidays together, with part of that time in Santa Barbara.”

If you don’t know, Zac and Halston were actually romantically linked once before back in 2014 for a short period of time.

Zac was last linked to Olympic swimmer Sarah Bro, but “the relationship just wasn’t working out.”

See photos from Zac Efron and Halston Sage together from their 2014 red carpet premiere…