Ariel Winter underwent breast reduction because her large chest was making her "unhappy".
The Modern Family star - who turned 18 last month - underwent surgery to reduce her enormous F-cup boobs because of the effect her huge bust was having on her mental health.
Ariel insists she was never bothered by the negative comments she received about her figure online and her decision was made purely to please herself.
Writing an essay for Motto - a new website from the editors of Time - she revealed: "People may find it hard to believe, but when I got my breast-reduction surgery last year, it wasn't because of the mean comments online.
"It wasn't because I didn't like how I looked. Having so much weight on my frame was affecting me psychologically. I was uncomfortable and unhappy. I chose surgery because of how I felt, not because of what anyone else thought."
"Afterwards, I automatically felt so much happier and just better physically. My back and shoulders didn't hurt any more!"
Ariel knew her boobs were going to be a lot bigger than average because she started puberty at quite a young age and her breasts grew very quickly, shifting attention from her acting work to her body.
She added: "Women are already over-sexualised, and I grew into my body so young. I was 13, 14 years old and I looked 19. Suddenly, people didn't want to talk about my job - they just wanted to talk about my cleavage.
"I'd go to awards shows and the next day see everyone on the Internet telling me I shouldn't look like this and dress like that. The conversation became about my looks instead of my talent and work - everything that I didn't want."
Since having the procedure, Ariel has a new found love for retail therapy and has enjoyed getting new clothes for her new breasts.
She explained: "The first thing I wanted to do was go clothing shopping because I was so excited to be able to find things that fit properly instead of hiding in a baggy sweater. That meant the world to me."
- Bang! Showbiz