Mega body: Meg Ryan steps out onto the golden sands in Cancun, Mexico, yesterday, unveiling her impressive bikini body

Packing a paunch: Her boyfriend John Mellencamp, however, kept his bulging belly under wraps in a T-shirt

Svelte: The Sleepless in Seattle star turns 50 in November, but she could easily pass for a woman 10 years younger judging by these snaps

She's just a few months shy of turning 50.

But judging by her enviably toned physique, Hollywood star Meg Ryan could pass for a woman at least 10 years younger.

The actress, who will hit the big 5-0 in November, is seen here on the beach in Mexico, confidently revealing her figure in a black high-waisted bikini.

The Sleepless in Seattle actress was photographed lapping up the sunshine in Cancun, Mexico, where she is holidaying with boyfriend John Mellencamp.

But the 59-year-old musician, who is divorcing his supermodel wife Elaine after 18 years of marriage, kept his paunch under wraps in a tight black T-shirt.

Mellencamp, who used to go under the stage name Johnny Cougar, has been dating Meg since late last year.