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Have Mercy! John Stamos shares epic throwback photo from his high school prom

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Have Mercy!

John Stamos, also known as Full House star Uncle Jesse, has always had epic hair. And now we have proof that his locks were on point even back in high school.

Stamos, 52, took to Instagram to share a throwback photo — all the way back to his high school prom.

The caption read: #TBT #Prom #Hair

View this post on Instagram

#TBT #Prom #Hair.

A post shared by John Stamos (@johnstamos) on

Stamos entered a 30-day substance abuse program this summer after being arrested for driving under the influence in June. He was sentenced to three years of probation on Tuesday.

His show Fuller House will stream on Netflix in 2016, and Grandfathered airs Tuesdays (8 p.m. ET) on Fox.