Zac Efron’s brother is FIT. Good genes then, eh?

Zac Efron and his younger brother, Dylan, have proven the Efron family clearly have good genes.

The 27-year-old actor posted a topless picture - to his five million Instagram followers - getting a piggyback from his HOT sibling, who is also topless.

We'd like that to be us please.

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The shot of the shirtless duo - which we likey a lot - amassed more than 458k likes. and was captioned #brothers".

In May, Zac posted a poem Dylan, 23, wrote about him in the sixth grade.

"When your dad goes through your little bro's old homework and finds a gem," Zac tweeted of the sweet poem called AA Brotherly Thing.

What a bunch of cuties.

In other news, earlier this year, Vanessa Hudgens, who starred in High School Musical with Zac, has said he turned her into a ‘mean’ person whilst they were dating.

The 26-year-old Zac dated for about five years and admits she found herself changing whenever she encountered any of his female fans.

Vanessa told The New York Times: “I went through a phase when I was really mean because I was so fed up.

“Girls were running after him, and I was giving them death stares. Then I realised that's not what that's about.

“Spread the love, be a good person, they support you, be nice.”

Word.

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