Sexy Siblings! Zac Efron Shares Shirtless Pic With Brother Dylan

Instagram

Who's hotter?!

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!

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."


PHOTOS: 11 Sexy Celebrity Brothers

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?