Ooo, do we need to sound our 'new couple alert' klaxon?
And as this sneaky photo posted by an awesome twitter spy reveals, he may have found his latest lady friend already, in the form of Swedish model Alexandra Storm.
Zac and Alexandra (Zalex? sounds like a prescription drug) were spotted getting cosy in the Café de Paris, Monte Carlo, where Zac appears to be reclining in the arms of the female hottie, their heads nearly touching.
We bet he feels really firm.
Now, obviously, as soon as we discovered the identity of the mystery woman with her hands all over (slight exaggeration) the Efron we had a nosy at her twitter page. And what we discovered confuzzled our poor brains.
Originally, we thought that Alexandra bore a passing resemblence to Demi Lovato - if we squint our eyes and sort of turn our head at an unatural angle.
THEN we discovered this little snap, which shows Alex looking MIGHTY SIMILAR to Zac-eroonie's ex-girlfriend Vanessa Hudgens. Can you see it?
Now, we accept that one 'sort-of-snuggling photo' isn't conclusive proof that Zac has a new woman in his life - who knows maybe he just slipped sideways in his seat - but let's all watch this space, OK?
We'll leave you with a photo of Alexandra's boob. Just because we're nice like that.