"Modern Family" actress Ariel Winter, known as Alex Dunphy on the TV series, admitted to Glamour magazine that her breasts grew "overnight" when she was just 15-years-old - and they didn't stop growing. She opened up about her decision to get breast reduction surgery last month, at the tender age of 17. Here are some before and after photos.

"I remember being in my sister's wedding and being so flat and thinking, 'I just wish I would grow boobs!' and then overnight I did," she told the publication. "But then they kept growing and growing and growing and it didn't seem like they were going to stop."

"I was 15 years old with [size] F [breasts]. It's like, 'How do you navigate that?'" Ariel Winter said.

"It started to hurt so bad that I couldn't take the pain," she admitted.

"A few of my cousins have had breast reductions, so it wasn't a shock when I decided to get one," she said, citing a history of large breasts in her family.

But she says the decision was really her own. "I got it for myself. I can't even really put it into words about how amazing it feels to really feel right."

On the morning of June 4, the "Modern Family" star underwent breast reduction surgery to reduce the size of her chest from a 32 F to a 34 D.

She said the moment she first decided to undergo the surgery was when she went to a swimsuit store. "I...couldn't find a bathing suit that fit me. I really felt bad about myself. I didn't feel happy. I just kept saying, 'What am I going to wear? There's nothing for me to wear at the beach, at the pool.' I can't go to a party with my friends and wear the same thing as them. I have to be completely covered up otherwise I'll look a certain way that I'm not intending to look."

She said the decision to go down to a D cup was made by her and her doctor. "I knew for sure that I wasn't going to go bigger than a D because the whole point was to get rid of it! I was a 32F and that was too big for me! My doctor said we shouldn't go bigger than a D, and I agreed. He said he didn't think we should go smaller than a C, and I agreed. And the reason I said that was because I have always been a curvier girl. Always. And I enjoy being a curvier girl. I don't want to be disproportionate again. I have a big butt, I like having a big butt. I didn't want to have a big butt and no boobs!"

Check out the before and after photos here:

BEFORE

A photo posted by Ariel Winter (@arielwinter) on Jan 27, 2015 at 5:06pm PST

A photo posted by Ariel Winter (@arielwinter) on Jan 1, 2015 at 10:55pm PST

A photo posted by Ariel Winter (@arielwinter) on Dec 21, 2014 at 5:20pm PST

A photo posted by Ariel Winter (@arielwinter) on Sep 8, 2014 at 8:10pm PDT

AFTER

A photo posted by Ariel Winter (@arielwinter) on Aug 13, 2015 at 6:45am PDT

A photo posted by Ariel Winter (@arielwinter) on Aug 12, 2015 at 7:35pm PDT

A photo posted by Ariel Winter (@arielwinter) on Jul 22, 2015 at 6:41pm PDT

A photo posted by Ariel Winter (@arielwinter) on Jul 11, 2015 at 10:36am PDT