CelebSpice

Showing that all of her hard work at the gym has been paying dividends, Hilary Duff flaunted her beach body on the beaches of Hawaii on Tuesday (June 23).

Enjoying an island getaway with her boyfriend Mike Comrie, the former "Lizzie McGuire" donned a sexy little two-piece swimsuit as she ran across the sand and hopped in the water to cool off.

The Hawaiian vacation comes ahead of the release of Hil's new movie, "What Goes Up," in which she's set to ditch her child star image.

Starring opposite Steve Coogan, the film is "set in the mid-80's when a reporter is sent to cover the Challenger Space Shuttle launch only to become mixed up in the lives of some local students."