The 20-year-old star shared a mirror selfie on Instagram, wearing a white and burgundy dress.

A Louis Vuitton Speedy bag was hanging on her arm with its colorful print from the Murakami collection clearly visible.

RELATED:

Young woman in a white dress with puffed sleeves, posing indoors.

Posing just months aftertying the knot with Jake Bongiovi, the actress flashed a pout and flaunted a big diamond ring to fans.

“Me and my mini,” she wrote in the caption. “@louisvuitton #lvxmurakami.”

The selfie sparked a whirlwind of both praise and criticism, with fans calling her “pretty,” “gorgeous” and “too cute.”

“YOU ARE INSANELY BEAUTIFUL MILLS,” read one compliment while another said, “you are so beautiful.”

“Too wonderful, wow,” said another.

Others questioned her appearance and asked, “U look 35 what happened??”

The 20-year-old star has previously addressed public scrutiny of young girls in the spotlight

Young person with purple headband, neutral expression, clear skin, and wearing a sleeveless top.

Young woman in a shimmering, silver dress, standing confidently in a well-lit room.

“So we have gone from 20 to 40,” another asked.

“MILLIE WHAT HAPPENEDDDD,” another questioned.

One wrote, “You don’t look like a 20 year old girl.”

“Millie’s google history: ‘How to look 65 when you are 16,’” quipped another.

Several speculated whether she went under the knife, asking, “Plastic surgery??”

Fans speculated whether she had gone under the knife after she shared the mirror selfie below

Young woman taking a mirror selfie, wearing a patterned dress and holding a designer bag, looks older.

“Sorry but wtf is this like why just whyyyyy so muchfillers and Botox,” one said while another wrote, “Plastic surgery? What happened with your face Girl, please don’t make such a kiss mouth.”

This isn’t the first time fans have speculated whether theStranger Thingsstar underwent cosmetic procedures.

Experts revealed that her changing appearance could be the result of “natural aging” as well

A person with dark hair, wearing a purple sweater, sitting indoors and smiling subtly at the camera.

Young woman in a green top and jeans posing against a purple background, showcasing an older appearance.

Dr. Paul Banwell, an award-winning consultant plastic and cosmetic surgeon, said her changed appearance could very well be the result of “natural aging.”

“Your bone structure and face shape will change as you get older, especially from such a young age of 12,” the plastic surgeon told theDaily Mail.

Even if she has undergone cosmetic treatment, Dr. Banwell said it isn’t “weighing her down,” as some critics claimed online.

“Her cheekbones appear higher and her lips appear fuller, which could be the result of filler,” he told the outlet.

Brown, who was only 12 years old when she landed the role of Eleven on the Netflix hit show, has spoken about howshe was thrust into the spotlight as a child.

The youngster was only 12 when she landed the role of Eleven onStranger Things

View this post on Instagram

She has also opened up about how her appearance has constantly been scrutinized over the years.

“Our world needs kindness and support in order for us children to grow and succeed,” she wrote in anInstagrampost as she turned 16 years old in 2020.

“But not ever will I be defeated. I’ll continue doing what I love and spreading the message in order to make change,” she added.

Brown and Jake Bongiovi had a private wedding ceremony in May before a lavish second wedding in October

Young woman poses with a man holding a camera. She wears white attire and a red bag, while he sports sunglasses and a white T-shirt.

Image credits:jakebongiovi

The emotional message was shared with a montage of her public appearances and media interactions over the years.

In 2022, she said it was “gross” the way the world obsessed over the looks of young girls in the spotlight.

“[I’ve] definitely been dealing with [being sexualized] more within the last two weeks ofturning 18— definitely seeing a difference between the way people act and the way that the press and social media have reacted to me coming of age,” she said on theGuilty Feministpodcast in 2022.

“I believe that shouldn’t change anything, but it’s gross and it’s true,” she continued. “It’s a very good representation of what’s going on in the world and how young girls are sexualized. I have been dealing with that — but I have also been dealing with that forever.”

The young star’s latest mirror selfie drew mixed opinions online

Comment mentioning “you look 35” on a post about Millie Bobby Brown looking older.

Comment questioning appearance with fillers and Botox, related to Millie Bobby Brown looks older.

Instagram comment about age progression, mentioning “so we have gone from 20 to 40.

Comment about Millie-Bobby-Brown looking stunning but different, with a heart icon and three likes.

Instagram comment questioning claims about Millie Bobby Brown’s appearance, mentioning a duck face.

Comment questioning Millie-Bobby-Brown’s new look with 2151 likes.

Comment praising beauty with heart emoji, mentioning “Mills” in response to Millie Bobby Brown looking older.

Comment about Millie Bobby Brown looking older in Hollywood.

Comment joking about Millie Bobby Brown’s appearance, suggesting she looks older than her age.

Comment discussing Millie Bobby Brown’s appearance and addressing rude remarks.

Comment mentioning resemblance to Natalie Portman, related to Millie Bobby Brown new photo.

Thanks! Check out the results:Karina Babenok

Donata Leskauskaite

News