Brooke Shields defies age with super hot bikini photos -- check it out!

Brooke Shields is one hot mama!

The 51-year-old former supermodel defied age when she hit the beach this week in a royal blue bikini and showcased her extremely fit physique. Shields was all smiles as she flashed her toned abs and posed her hand strategically on her hip.

The hard work is starting to pay off.

A post shared by Brooke Shields (@brookeshields) on

She captioned the hot snap, "The hard work is starting to pay off."

She's likely referring to her taut tummy -- and whatever she is doing is definitely working. She polished off the rest of the her beachy look with a straw hat and jewelry.

Me and my "Sassy" forever!

A post shared by Brooke Shields (@brookeshields) on

Shields appears to be hanging out on vacation and later posted a photo with one of her good friends.

Check out all the hot celebrity beach bods so far this year:

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Spring Break Celeb Beach Bods 2017
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Spring Break Celeb Beach Bods 2017
Don't know if it's physically possible for me to get any more tan....
Why not? 😏
#turksandcaicos #funinthesun
Yep
Best day!!
Pre-sunset πŸŒ…πŸ˜ #currentsituation
Love this suit from @shoplunab !!!
Hey I look just like you here @luvismyreligion4
πŸ’‹ @elizabethhurleybeach @fregateislandprivate
Float float and some funny marks on your bum when you get up
Happy oh happy
Forever in Denim. Thanks @VogueMagazine! #momjeans
Spring Break #2017 with the kiddies #lifeofnene
Welcome to the family!! @cashiethefrenchbulldog 🐢 Click link in my bio!! πŸ‘™πŸ©
super busy
You can get these beautiful long fabulous cover ups at SWAGG BOUTIQUE. Will post more about it later #lifeofnene πŸ’‹
X2 cuz why not! πŸ€·πŸ½β€β™€οΈ
Swingin' around β˜€οΈ
Salty kisses on my tan #girlonthecoast (Viv calls it the "coconut song") #GOLD
Peace and love #ready for any storm πŸ™πŸ»πŸ™πŸ»πŸ™πŸ»
@lspaceswim photoshoot with mommy πŸ–€ πŸ“Έ@damir_k @pinkdustcosmetics
Loving the Sunβ˜€οΈ#yoga #vitamind #namaste
morning🌺
Together ❀
Oh Hi. Going from this to the NYC blizzard tomorrow. 😽 #ILOVELA
Sun baked #Maldives πŸ‘™πŸŒžπŸ’¦
☺️
Saltwater hair | πŸ“Έ: JC
Love these days!!! #sundayfunday
Early morning session with @emerysurfboards @australia
Sunday funday with my #mcm πŸΉπŸ‘™β˜€οΈ
I need you out in Jamaica relaaaxxin..😍😍
Make time for yourself #spaday 🌺Horizontal shower! Day spa para relaxar! #sunday #relaxing #aigaispa #tranquilidade #serenity
Today was booootyful β˜€οΈ
The beach is def my happy place and in ONE WEEK I'll have my toes in the sand again while listening to some country music at @tortugamusicfestival. Doesn't get much better than that. πŸŒŠβ˜€οΈπŸŒ΄
Bye bye Nica 🌈 we love you @loveyogaspace
Having zero fun 🌊
Like my scarf??? @oprah and @talbotsofficial have teamed up for @dressforsuccess and that means...you can buy this scarf (and other items) and be supporting an AWESOME organization #talbotsxomag
We can go to the island 🌴🌺 & get you gold, no spray tan πŸŒžπŸ™…πŸ½ #nicsflingb4thering @modernhonolulu #hawaii
😘 @elizabethhurleybeach @sixsenseszilpasyon
COACHELLA
This is the look of pure bliss! I'm so blessed! I'm so blessed! I'm so blessed! @acaciaswimwear #islandlife #6yearsin #grateful #muchneededbreak #fridayfeeling πŸ“· @eddiecibrian ❀
Feels like summer!!🌸 #luke
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