Some online think Anne Hathaway is not believable as a 40-year-old mother of a teenager.

What is 40 supposed to look like?

No one is going to believe Anne Hathaway is 40 I mean come on!

A couple, with the man on the left and the woman on the right, walk arm in arm on a street. The woman holds a coffee cup. Other people can be seen in the background

Hollywood is trying to convince you Anne Hathaway is old.

What exactly is a 40-year-old woman supposed to look like?

(Some menparticipated in the trend, too.)

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This ageist discourse about#AnneHathawayin#theideaofyounot looking her age has me wanting to do an experiment.

I want to see how real women between 35 and 45 look like.

I am 39.pic.twitter.com/jJJOQdQGLN

If youre over 40, post a pic.

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People need to see were not old and gray, thecaptiontomanyof thepostsread.

Genevra Siciliano, a 47-year-old photographer andpodcast host, was among those who posted.

The startled reactions to Hathaway came at an interesting time.

Man (shirtless) and woman covered in sheets in a bedroom, looking at each other intently

saidKrishma Arora, a 44-year-old writer, who posted a This is 40+ selfie.

Many responded positively to TV writer Gennefer Grosss commentary on theThe Idea of Youage conversation.

When, in fact, theyre more vibrant, hotter, and hornier than ever,she tweeted.

Woman with wavy blonde hair holding a cocktail with a lime garnish, smiling at the camera

There is nothing sexier than lived experience.

At the time, Bancroft was a mere 35.

Grosss personal experiences just dont sync up with that.

A person with glasses and blue hair smiles in front of flowering bushes. The text discusses how 40 looks different for everyone and mentions genetics and skincare

My teenage son cant even keep up with me sometimes!

Enocha Edenfield, 42, posted a this is 40-something selfie, too.

Now that Im in my 40s, I just dont care what others think I should look like.

Louise Dockery (left) and her sister smile with arms around each other, celebrating Louise's 48th birthday. Text discusses generational mindset shift

Louise Dockery, a 48-year-old resilience coach for women who posted a selfie, feels that way, too.

Turning 40 was when she finally felt happy in her own skin.

That showed on my face and in my personality, she told HuffPost.

Sarahzsays' post: "People saying Anne Hathaway doesn’t look 40? This is 63." Includes photo of Sarahzsays with long hair, purple lace top, smiling in a car

Ive never had more energy or passion for life, she said.

Im sure well still be doing it in our 60s, why not?

Sarah Zink, 63, also posted a Hathaway-inspired selfie.

Thats when we begin to understand the value of our bodies, desires and appearance, Zink said.

Im seeing more women working on their self-esteem, versus their wrinkles.

They are working on healing their past trauma versus flabby thighs.

Internal work is surpassing the need for external work.

Excuse the language, but I am un-fuck-withable, she said, with a laugh.

I dont need anyones approval of what I wear, how I wear it, or anything else.