Brooke Shields is having a brat summer.

The Blue Lagoon star made a surprise appearance in her daughter Grier Henchy's July 23 TikTok, which featured the duo twinning in black tops and jeans dancing to Charli XCX's new single "Apple," off her hit album Brat.

The 18-year-old, the youngest of Brooke's two daughters with husband Chris Henchy, captioned her video, "Mom is so julia," a reference to a lyric from Charli's song "360," released in May, which pays tribute to Julia Fox.

One day earlier, Brooke shared a video of herself dancing solo to the same song on her Instagram. "My girls keep telling me it’s a brat summer @charli_xcx," the Endless Love actress captioned her post. "I thought that started when they were born!"

Of course, this isn’t the first time the duo have twinned on TikTok as Brooke previously appeared in Grier’s March 2023 video, which showed the 59-year-old and her daughter lip synching a remix of Nicki Minaj's 2009 track "Itty Bitty Piggy" while sporting burgundy outfits.

They’ve also taking those matching moments to red carpet as they both donned black gowns—with Grier wearing a Richard Tyler dress her mom previously donned in 2006—while at the CNN Heroes: All-Star Tribute event in New York City.

Brooke and her husband, who have been married for more than 23 years, are also parents to daughter Rowan Henchy, 21.

The Suddenly Susan alum and her kids have often offered glimpses into their life on social media, where Brooke faces the challenge of helping her daughters deal with possible negativity online.

"They'll say, ‘Mom, it's amazing how nasty people can be,'" the actress exclusively told E! News in 2022. "That's a moment for a conversation rather than dictating to them."

Look back at more celebs and their mini-me kids over the years...

The Full House alum appears with her look-alike eldest daughter (left) and daughter Beatrix during a trip to Jamaica in 2023.

Like mother like daughter. After becoming a household name on The Real Housewives of Beverly Hills, the former supermodel Yolanda Hadid's daughter Gigi Hadid broke into the fashion industry as a teen and has been rocking runways ever since.

Clint Eastwood's fifth child, son Scott Eastwood, has followed in his movie star footsteps by starring in films like Suicide Squad, Snowden, The Fate of the Furious and Pacific Rim.

The Bon Jovi singer and his third child is his mini-me. Pictured: The two appear on either sides of with the musician's wife, Dorothea Bongiovi, and their youngest son Romeo Bongiovi at the Jefferson Awards Foundation' 2017 DC National Ceremony at the Capital Hilton in Washington, DC. in 2017.

The look-alike duo is all smiles while attending a 2016 performance of Finding Neverland in the Big Apple. 

Woah, the Marsden men's resemblance was uncanny at the 2017 SAG Awards.

Double take! The Real Housewives of Atlanta alum's  daughter looks like her younger sister!

The soccer star has the cutest plus-one ever at the London premiere of Ronaldo.

Sailor is taking after her mom in the modeling industry.

And Kate's daughter is also following in her mom's famous footsteps.

Here posing for an Instagram snap before the Hot Pursuit premiere in Los Angeles, mom and her daughter have never looked more alike!

Like mother, like daughter. The two attend the Vanity Fair Oscars party in 2015.

With their matching jumpsuits, sleek hair and glasses, the two look more like twins than mother and daughter! "That moment when you realize you actually are becoming your mother #twinning #imnotmad," Willis joked on Instagram.

Pictured here in 2010, the pop icon's daughter is a fashionista just like her mama!

You'll get a kick out of how much the soccer star and his son look alike.

The spunky morning show host celebrated her daughter's 14th birthday with this adorable pic. Look at that resemblance!

Once upon a time in Hollywood...the Kill Bill actress twinned with her daughter on the red carpet.

Little Blue stole the show at the 2017 Grammys, and she's totally #twinning with her pops!

The Days of Our Lives star and her daughter get in the holiday spirit at Disney On Ice Presents Frozen at the Staples Center. 

The mother-daughter pair looked like virtual twinsies (especially with those matching bobs) at the Chanel fall-winter Haute Couture show in Paris.

The Oscar-winner and her daughter both rock the red hair.

The nearly identical stunning stars even dress the same!

The Fuller House star and her daughter are practically twins at the Summer TCA Press Tour. 

The Last of the Mohicans and Lincoln star's young adult son, whose mother is French actress Isabelle Adjani, made his big runway debut at 2015 Paris Fashion Week, walking into the Chanel show with Julianne Moore.

The two stunned on the red carpet at the Olivier Awards in London.

If you didn't know better, you might've guessed they were sisters!

This apple certainly doesn't fall far from the tree!

Mammia Mia! You can certainly see the family resemblance.

The EGOT winner posted this baby photo of himself, looking exactly like baby Luna on Oct. 6, 2017

This mother-daughter duo never fails to turn heads.

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