Hilary Duff is one hot mamma!

The "Younger" actress showed off her killer body while vacationing with her son Luca Comrie, 3, and ex-husband Mike Comrie in Maui, Hawaii on Thursday.

PHOTOS: Hilary Duff Flashes Cleavage in Sexy Bikini Selfie From Hawaii

Donning an itty-bitty, colorful stripped bikini, the former Disney star revealed her toned stomach and legs.