Melanie Griffith Shows Off Her Toned Figure in New Instagram Selfie - See Her Rock-Hard Abs!

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Melanie Griffith is Hollywood royalty and so are her abs!

The 59-year-old actress took to Instagram on Thursday to show off her toned figure.

WATCH: Melanie Griffith Shows Off Crazy Long Legs in Chic LBD -- See the Pic!

“Getting ready to go work those abs! @gunnarfitness #workinitat59 #lovingsummer” she captioned her mirror selfie. 

The mother of three has been training with celebrity trainer Gunnar Peterson, who also took to Instagram to share the same photo of Griffith with the caption, “Work work work work work.”

Peterson is known for working with the Kardashian family, Kate Beckinsale, Ariel Winter, Amber Heard, Cassie, Ciara and several NBA players.

He recently had Dwayne Johnson and Jennifer Lopez working out at this gym in Los Angeles. 

WATCH: Khloe Kardashian Shares More Before and After Pics of Her Physical Transformation

Khloe Kardashian has credited Peterson for transforming her body. "Gunnar Peterson has been a family friend of ours.' He changed my body," she told Health magazine earlier this year. For more on that interview, watch the video below.

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