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.
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.