United Kingdom, Oct. 2 -- Nina Dobrev has insisted she and Zac Efron are "just mates".

The former Vampire Diaries star, 36, and the 37-year-old High School Musical alum were rumoured to be dating after they were spotted on vacation together in September.

Nina has now shut down the romance rumours.

She was asked by a TMZ reporter on Wednesday (01.10.25): "Anything to that Zac Efron thing?"

The journalist swiftly followed up with: "You're just mates?"

To which, Nina replied: "Yeah."

The actress said of dealing with a breakup: "You know what? I'm excited for the future and the only thing that's guaranteed is change."

The pair both attended crypto billionaire Brad Garlinghouse's wedding in the South of France on September 20.

That wee...