Ariel Winter is all grown up!

The 18-year-old Modern Family star was spotted on spring break with her boyfriend and a few friends wearing a very revealing bikini — and even showed some PDA on the sand!

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Since getting breast reduction surgery last year, the brunette beauty has been showing off her body on Instagram, this time wearing a white and gold chain Beach Bunny two-piece that you can shop here!

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🌴💋🙈 hehe #springbreak #mylove

A post shared by ARIEL WINTER (@arielwinter) on

Also spotted on the tropical getaway was Ariel's television brother, Nolan Gould, who also snapped a pic with the voluptuous teen.

RELATED: Emily Ratajkowski Shows Serious Cleavage While Wearing Revealing One-Piece

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TV family vacation at @atlantisresort

A post shared by Nolan Gould (@nolangould) on

Recently, the actress showed her support for Kim Kardashian amid her naked selfie controversy. "No one was body shaming @justinbieber when he posted his nude guitar photo so why @KimKardashian? #herbodyherchoice," the star tweeted.

She continued, "I think everyone, men and women, should have the right to choose what they do with their bodies — and not be criticized."

For more celebs showing off their smokin' bikini bods, check out the gallery below!