In the glamorous world of Hollywood celebrities, even the biggest stars face their fears.

Whether it was creepy creatures that scared them or jumping out of a scary movie, stars like Jennifer Aniston and Kristen Bell got candid about what scared them the most.

‘FRIENDS’ STAR JENNIFER ANISTON SETS BOUNDARIES WHEN IT COMES TO AUDITIONING: ‘I WOULD NEVER DO IT’

“Friends” star Aniston She confessed that being in the air or underwater terrifies her.

While Aniston was traveling with her “Friends” co-star Courteney Cox, she shared that her trip took a turn for the worse when she traveled by plane in 2019.

Jennifer Aniston, right, said she got scared during a flight with her “Friends” co-star Courteney Cox. (Emma McIntyre/Getty Images for Turner)

“We heard an explosion, which sounded like a pothole if it were a car big enough to go through the Grand Canyon. It was very loud,” Aniston previously said during an appearance on “Jimmy Kimmel Live!”

“I’m obviously very afraid of flying, but no one else is. So Courteney Cox, whose father is a pilot and is never afraid, says, ‘Should we have checked? Is everything okay?’ They said: No, no, it’s rolling, it’s going smoothly.”

In 2015, Aniston admitted that being underwater scared her.

“Basically I have a real fear of going underwater,” the Hollywood actress said during a screening of her film “Cake,” as reported. MY! News.

“I was a little girl and I was riding this tricycle around a pool… I drove my tricycle into the pool, I didn’t let go and my brother tried to (help me),” Aniston explained. “So, I can’t dive in and no one will believe me. I honestly can’t.”

Jennifer Aniston revealed that she is also afraid of going underwater. (Michael Buckner/Variety via Getty Images)

‘BEETLEJUICE 2’ STARS WINONA RYDER AND JENNA ORTEGA SHARE ‘HOLY’ BELIEF THAT THE FILM CAN BE ‘A RELIGIOUS EXPERIENCE’

The stars of “Beetlejuice Beetlejuice” told Fox News Digital what really scares them.

When asked by Fox News Digital what her fears were, Catherine O’Hara, a member of the original cast of “Beetlejuice,” said she can’t stand the movie “The Exorcist.”

Meanwhile, actress Jenna Ortega, 22, fears awkward social interactions.

“I can’t dive in and no one will believe me. I honestly can’t.”

—Jennifer Aniston

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“Those social interactions in which… you get nowhere…” Ortega explained to Fox News Digital.

“Like a bad date?” -O’Hara asked.

“Yeah, I just hate that. I hate to mention it. There was once… there was someone who worked for… the Four Seasons… a really nice guy. But… I think I was 16 at the time, and I was having a conversation with this guy in the middle of a press…”

“We were talking about the weather… for about 10 minutes, and we both knew, I could see in their eyes that… neither of us wanted to have that conversation, because… it didn’t change our lives. So, I think those “Conversations are… brutal to have.”

Her co-star Justin Theroux, on the other hand, said he fears death.

“I’m very hypochondriac. So of course I fear death, which I think we all have. Maybe it’s a natural condition,” he said.

The stars of “Beetlejuice Beetlejuice” told Fox News Digital what really scares them. (Getty Images)

OLIVIA RODRIGO SUFFERS INCORRECT MOMENT AFTER ASKING TO KISS HER BROTHER AND SISTER WITHOUT KNOWING IT AT A CONCERT

The birds appear to ruffle the feathers of several celebrities, including Olivia Rodrigo and Scarlett Johansson.

The former Disney star opened up about how feathered creatures certainly aren’t her favorites.

“Birds are so strange to us: there is no part of the body that looks like ours,” said Rodrigo. rolling stone last year.

“Everyone is afraid of aliens and m… They say, ‘What will the aliens look like?’ I say: ‘We have birds on our planet and we are not afraid of them!'”

Former Disney star Olivia Rodrigo talked about how feathered creatures certainly aren’t her favorites. (Matthew J. Lee/The Boston Globe via Getty Images)

While you’ll never catch Rodrigo watching Alfred Hitchcock’s “The Birds,” Johansson joins the pop star in this common fear.

During an interview with Vulture in December 2011, Johansson revealed that she is afraid of birds, which made filming “We Bought a Zoo” especially difficult. A scene featuring a peacock was scary to film because she was “scared of them” and didn’t want them to “get too close,” saying “they’re bad.”

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“I’m just afraid of birds. Something about the wings and the beaks and the flapping of their wings, I’m terrified of them. That hasn’t gone away yet. If they had asked me to put a bird on my shoulder, I would have done it.” I did it, but it would have been difficult,” he told the outlet. “Actually, my uncle is also terrified of birds, so it runs in the family.”

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Scarlett Johansson revealed that she is afraid of birds. (Paolo Blocco/FilmMagic)

Kristen Bell’s husband Dax Shepard revealed that his wife hates “rotten” fingers.

He exposed the actress on social media, sharing a photo of her wearing gloves in a pool.

“My girlfriend wears gloves in the pool because she hates the feeling of her fingertips on her skin. #Hollyweird #iloveher,” he wrote on Instagram in 2018.

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The “Good Place” actress explained her fear to her fans.

“I would call it a very serious, undiagnosed and yet to be discovered medical condition that dozens of people in the United States could also suffer from,” Bell explained in “Jimmy Kimmel Live!” At the moment.

“I’m not ashamed,” he commented. “In my life I want to eliminate the stigma of the maybe 10 people who also suffer. You are not alone!”

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Martin Freeman admitted he has a strange fear of avocados.

During an appearance on “The Graham Norton Show”, The English actor revealed that he hesitates to eat avocados because he is terrified of choking on the large pit or “stone” in the middle.

“I’m afraid of suffocating,” Freeman said. “It’s a completely rational fear; it’s happened to me a couple of times when I ate crisps too quickly and it scares the hell out of me.”

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“I confess that whenever I eat an avocado I imagine the bone lodged in my trachea. I don’t have that much avocado!” he admitted.