Sydney Sweeney says she considered getting a breast reduction at 18 until her mom talked her out of it

• Sydney Sweeney told Glamour UK that she previously felt "uncomfortable" with her breast size. 
• Sweeney wanted to get breast-reduction surgery when she turned 18 but her mom told her she'd regret it.
• The actor said she's "so glad" she didn't end up following through. 

"Euphoria" star Sydney Sweeney said that she felt "uncomfortable" with her breast size as a teenager and wanted to get reduction surgery, but her mom talked her out of it.

"When I was in high school, I used to feel uncomfortable about how big my boobs were and I used to say that when I turned 18, I was going to get a boob job to make them smaller," Sweeney recalled in a new interview with Glamour UK, released on Tuesday. "And my mom told me, 'Don't do it. You'll regret it in college.'"

Sweeney said that she covered up her body with oversized clothing when she was younger. But as she matured, she became more confident and empowered.

"Flaunt what you got. Own it. Love them," she said.

The actor, who stars in the new rom-com "Anyone but You," said that she's happy she didn't follow through with breast reduction surgery.

"I'm so glad I didn't. I like them. They're my best friends," she said. "Everybody's body is beautiful. When you are confident and you're happy within is when it really shows to other people."

Sweeney previously opened up about feeling insecure about her body during an interview with The Sun published earlier this year, saying, "I had boobs before other girls and I felt ostracised for it."

In an accompanying video for Glamour UK, the two-time Emmy nominee said that the biggest misconception about her is that she's "a dumb blonde with big tits."

"I'm naturally brunette," she said. "I'm very different than a lot of the characters I play or the versions that you see me on carpets or in interviews because I'm still made up. This is still the work version of me."