This article mentions disordered eating and may be triggering for some readers.

After years of rumours and speculation, Bella Hadid has opened up about having plastic surgery.

In an interview accompanying her cover shoot for the April issue of AmericanVogue, the supermodel has spoken about feeling insecure about the way she looked as a teenager, her mental health and the difficulties she faced growing up with her sister Gigi Hadid.

Here are the most interesting things we learned from her cover story.

She felt like she was the "ugly sister".

While she might be one of the most successful and sought-after models in the world, Bella Hadid said that growing up, she felt "ugly" next to her older sister and fellow model Gigi Hadid.

"I was the uglier sister. I was the brunette. I wasn’t as cool as Gigi, not as outgoing," she toldVogue. "That’s really what people said about me."

The 25-year-old went on to say that the comments deeply impacted her esteem and sense of self-worth as she grew older.

"Unfortunately, when you get told things so many times, you do just believe it."

"I always ask myself, how did a girl with incredible insecurities, anxiety, depression, body-image issues, eating issues, who hates to be touched, who has intense social anxiety — what was I doing getting into this business? But over the years I became a good actress. I put on a very smiley face, or a very strong face. I always felt like I had something to prove."

She continued, "People can say anything about how I look, about how I talk, about how I act. But in seven years I never missed a job, cancelled a job, was late to a job. No one can ever say that I don’t work my ass off."

She got a nose job at 14 years old - and regrets it.

There's no denying that rumours and speculation of plastic surgery have been swirling around Bella Hadid for years, with many people speculating that her face and body have been altered through cosmetic surgery.

In the interview, Bella said the criticism of her looks and her underlying insecurities of 'not being enough' influenced her to go under the knife and change her face.