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WINNIE-ING!

Wonder Years icon, 48, looks unrecognizable in just a bra as she shows off 6-pack abs 35 years after show

THE WONDER Years star Danica McKellar has shocked fans with her nearly unrecognizable appearance in new photos showing off her fit figure.

The 48-year-old actress took to Instagram last week to flaunt her toned physique while hitting the gym on vacation.

An actress from The Wonder Years shocked fans as she looked unrecognizable in new photos
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An actress from The Wonder Years shocked fans as she looked unrecognizable in new photosCredit: Disney General Entertainment Con
Danica McKellar showed off her fit figure while working out on vacation
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Danica McKellar showed off her fit figure while working out on vacationCredit: Instagram/ danicamckellar

In one close-up shot, Danica smiled following a sweaty workout session donning a bra, no makeup, and her hair in a messy bun.

It followed with more snaps from her exercise routine, where she showcased her toned abs and arms.

She posed with her 12-year-old son, Draco, capturing a full-body shot of her body and workout attire.

Danica paired her black and gray sports bra with tight red leggings, sneakers, and her dark locks flowing straight down.

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Her son and husband, Scott Sveslosky, even joined her at one point, with Draco trying out his moves on a boxing bag while his stepdad held it steady.

Danica shares the pre-teen with her ex-husband, Mike Verta.

The family was vacationing in Costa Rica, but that didn't prevent the Dancing With the Stars alum from keeping up with her fitness routine.

She gushed in her caption: "#FBF to working out... on vacation! Costa Rica was great but SO hot & humid, and the ocean & pool were also super warm... so some days we feel pretty sluggish, wanting to just sorta lie around.

"But my body got so antsy & knew it needed to MOVE, so the air-conditioned gym was such a blessing! And man oh man - always SO happy after a workout. That circulation moving, the endorphins flowing."

Danica's post concluded: "Somebody please tell me: Why is it often so hard to motivate to do something that we KNOW we'll be so glad that we did??"

Fans were taken aback by the TV icon's appearance in the snaps and said so in the comments.

"Muscle Mama," one person remarked with a slew of flexed bicep emojis.

"So pretty w/wo makeup," added another.

HOT MAMA

Danica again showed off her pin-thin frame in other photos from the getaway of her wearing a skimpy leopard-print bikini.

Fred Savage's former co-star looked ageless in the Instagram post while posing near a waterfall.

She captioned it: "Costa Rica photo dump!! My family and I had a wonderful time and many adventures! 

"Swimming, snorkelling, waterfalls, horseback rides, rainforest walks (that tree frog looks like a National Geographic - but that was taken on my phone!), and more.'

"And that very last shot at the waterfall?

"Shout-out to @glebsavchenkoofficial for teaching me dance arms - if you wanna get better at something, you practice wherever you are!"

Danica added: "We took some pics & video on my husband's underwater camera so once I get those, there might be a part two.

"Super grateful for the opportunity to make new family memories in a cool new spot, and I'm wishing you a week of making beautiful memories, whether on adventures, or right at home."

CAREER SUCCESS

Danica rose to fame when she played Winnie Cooper on the popular sitcom The Wonder Years from 1988 to 1993.

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She has since starred in a string of TV and film roles and competed on Dancing With the Stars in 2014.

The mom of one also discovered her love of mathematics after graduating from the University of California, Los Angeles, and published numerous math books.

She flaunted her figure in other photos from her Costa Rican getaway of her donning a skimpy leopard-print bikini
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She flaunted her figure in other photos from her Costa Rican getaway of her donning a skimpy leopard-print bikiniCredit: Instagram
Danica starred on the show from 1988 to 1993 opposite Fred Savage
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Danica starred on the show from 1988 to 1993 opposite Fred SavageCredit: Getty
She has since starred in a string of TV and movies, and competed on Dancing With the Stars
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She has since starred in a string of TV and movies, and competed on Dancing With the StarsCredit: Getty