Rachel McAdams is not afraid to show off her all-natural look.

The "Mean Girls" star flaunted her armpit hair in a provocative photo shoot ahead of her movie release of "Are You There God? It’s Me, Margaret," based on Judy Blume’s beloved 1970 novel.

McAdams, 44, opened up about embracing her body as it constantly went through changes throughout her life — from puberty to motherhood.

The mother of two is seen lying on a velvet burgundy couch with her head tilted back, eyes closed and arms sprawled out, displaying her hairy armpit.

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Rachel McAdams on a couch wearing all black

"Mean Girls" star Rachel McAdams flaunted her armpit hair in a provocative photo shoot. (Mark Seliger for Bustle)

McAdams donned a black corset with matching pants and strappy heels. She completed her look with silver hoop earrings and a necklace.

"With this shoot, I'm wearing latex underwear," McAdams admitted during her cover interview for Bustle.

Rachel McAdams wearing a black bra top and shorts

McAdams wore latex underwear for her photo shoot with Bustle. (Mark Seliger for Bustle)

"But I've had two children. This is my body, and I think that's so important to reflect back out to the world."

McAdams is married to screenwriter Jamie Linden, and they share two kids together.

During her risqué photo shoot, McAdams requested her images to be edited as "minimally as possible." 

Rachel McAdams in a black blazer with no shirt

McAdams is seen topless in one photo while wearing an oversized jacket and black pants for the Bustle photo shoot. (Mark Seliger for Bustle)

In the images, the "Notebook" star is seen topless in one photo while wearing an oversized jacket and black pants. 

Another picture showed McAdams in a yellow-green blazer and matching pants. She wore a white bra underneath and a long necktie.

Rachel McAdams in a yellow suit

McAdams is seen in a yellow-green blazer and matching pants. She wore a white bra underneath and a long necktie during her Bustle photo shoot. (Mark Seliger for Bustle)

"It's OK to look your best and work at it and be healthy, but that's different for everyone," the actress added.

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While "Are You There God? It’s Me, Margaret" is considered the "puberty bible," McAdams candidly spoke out about her body changes during motherhood.

Rachel McAdams at a premiere

McAdams attends the Los Angeles premiere of "Are You There God It's Me, Margaret" on Saturday. (Getty Images)

"I felt like a milking machine," she confessed, as she gave birth to her daughter five months before filming and would pump in the middle of work.

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"The great irony is Margaret just can’t wait to get into a bra. But I’m playing a kind of wild child, hippie artist mom [who] doesn’t wear a bra throughout the whole film." 

Movie still of Rachel McAdams and Abby Ryder Fortson from"Are You There God? It's Me, Margaret"

McAdams, left, and Abby Ryder Fortson star in the film "Are You There God? It's Me, Margaret" based on the book by Judy Blume. (Lionsgate)

After her costume designer suggested McAdams go braless while filming, she addressed the challenges she faced, since breastfeeding caused her to have leaks and size changes.

However, she was boldly open to the idea.

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"[We] really wanted Barb to feel like a real person who’s still figuring herself out, to put Margaret and her on similar trajectories," McAdams said.

"Are You There God? It’s Me, Margaret" is set to be released in theaters on April 28.