Sexy siblings! Zac Efron shares shirtless pic with brother Dylan

Zac Efron's Brother Dylan Efron Is Just as Hot as He Is!

It's hard to say who's hotter in this pic of Zac Efron and his younger brother Dylan.

The 27-year-old heartthrob posted the Instagram image on Monday showing him and his baby bro shirtless and goofing around. He hashtagged the pic, "#brothers."

WATCH: Zac Efron Swings Shirtless in Hawaii -- See His Ripped Body!

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A post shared by Zac Efron (@zacefron) on

This wouldn't be the first time we've gushed over the Efron boys. This past May, Zac shared a poem that Dylan penned about his famous sibling for an old homework assignment. The poem was titled "A Brotherly Thing."

"My brother is a movie star, and is only 16," Dylan, who's now in his early 20's, wrote. "He doesn't have a job yet. Still, he thinks he is the queen."

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Sexy siblings! Zac Efron shares shirtless pic with brother Dylan

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Showing love for his older brother, Dylan added, "I guess he isn't that bad, if I think about it twice. He helps me with my homework, and always gives advice."

Who do you think is hotter: Zac or Dylan?

Dylan Efron Dubs Big Bro, Zac, 'the Queen' in 6th Grade Poem
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