He starred in the raunchy 2016 flick Dirty Grandpa with Robert De Niro,
And Zac Efron was ready to make mischief with his own granddad with his brother Dylan on Monday.
The siblings teamed up to sneak their grandfather out of his resort-style retirement home for some quality time, sharing the experience on Instagram.
As he tiptoed around the senior living facility, the 33-year-old actor did his best to go unseen as he crouched low, before swiping a staff member s ID to gain access to his grandpa s room.
Doting grandson: Zac Efron and his brother Dylan teamed up to sneak their grandfather out of his resort-style retirement home for some quality time on Monday
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According to various reports, Zac was introduced to ex Vanessa by her boss at Byron Bay s General Store café in June last year, and the pair hit it off straight away.
Two months later, in August, Daily Mail Australia revealed Zac had cancelled his scheduled return flight to Los Angeles because he didn t really want to go back .
Heartbreak? Zac has been largely quiet on social media ever since splitting with girlfriend Vanessa Valladares (pictured) in April
Within weeks, the genetically-blessed couple had moved in together in Byron Bay.
Zac confirmed their relationship in September when they were spotted holding hands in public.