Hilary Duff Flaunts Major Cleavage in Bikini Selfie

The 'Younger' star showed off some serious skin will relaxing poolside in a bikini.

Hilary Duff is looking seriously sexy and adorably playful in a stripped bikini.

The 27-year-old spent her day showing off some serious skin while drinking down a fruity beverage under the shade of a poolside cabana.

Duff shared a look at her fun day of rest and relaxation in a black-and-white pic posted to Instagram on Thursday evening.

WATCH: Is This the Hottest Hilary Duff Has Ever Looked?

The Younger actress seemed to be having one ridiculously fun summer day -- so much fun that she couldn't even caption the pic in real words, just expressive emojis.

It's unclear where Hilary is kicking back in that killer bikini, but it's hard not to be jealous -- we've always wanted to drink straight out of a pineapple.

Hilary is no stranger to sharing revealing pics. The actress, who has a 3-year-old son Luca, has frequently taken to Instagram to show off her fit body to inspire other moms.

WATCH: Hilary Duff Is on Tinder! 'I'm Talking to Probably About 9 Guys Right Now'

Recently, Hilary and her sister Haylie Duff sat down with ET to address their fight against mom-bullying through the Sisterhood of Motherhood campaign. Check out the video below to hear more.

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