Both sporting fun summer outfits, the "Cheaper By the Dozen" darling was donned a tribal print bikini cover up, sunglasses and a fedora while her big sis rocked cutoff coral denim shorts and a zebra print sheer blouse.
The Mexican getaway comes after Hilary gave birth to her adorable son, Luca, back in March and, in a recent interview with Access Hollywood, she opened up about her experiences with motherhood and the hard task of shedding the baby weight.
While talking about her two month old bundle of joy, the 24 year-old excitedly gushed, ?He?s a lot bigger now, he?s just growing by the day and I?m having such a great time,? adding, ?It?s like every day he does something new and exciting.?
As far as the pesky baby weight that comes along with the joy of having a baby, Duff said she isn?t too concerned, explaining, ?I am working out and I?m trying and I?m trying not to [obsess]. Everyone wants their body back, but all in time. It took nine months to get there and so hopefully, it won?t take that long to get it off, but I?m doing it slowly.?
To check out more of Hilary?s interview, you can watch the video in the player below!