"She and Austin are solid, but letting Zac back in her world would be playing with fire — he was her first big love," the source claimed.
Indeed, Disney fans would be happy to see their favourite HSM pair reunite in real life but considering Hudgens's "animosity" towards Efron, "Zanessa" seems to be a far-fetched dream.
This clearly hasn't gone down well with 24-year-old Butler, whom 27-year-old Hudgens is dating currently.
Efron and Hudgens had first met on the sets of High School Musical, a Disney original, and had been dating since then.
While the cast has yet to be confirmed, insiders claim that the former couple had too much history and could not even be in the same room together.
However, after completing five hopefully happy years together, the couple split in 2010.
The Dirty Grandpa actor recently became single after breaking up with girlfriend Miro and is currently shooting for the movie remake of popular show Baywatch.is officially happening, fans of the Zac Efron and Vanessa Hudgens team up could not help but hope that the duo will return to the highly popular franchise.