Twiggy reveals untold reason she was so thin in the '60s

Twiggy has spilled the beans on her famously slim 1960s figure.

Born Lesley Hornby, she was discovered in 1966 at just 16 years old and quickly became a global sensation.

However, she also had to repeatedly defend herself against accusations of disordered eating.

In a new documentary directed by Sadie Frost, fashion icon Twiggy opened up about the intense scrutiny she faced over her slender frame during her rise to fame in the 1960s.

"I was just born that way," Twiggy, now 77, told People. "If you saw what I used to eat, it was everything. It was just my metabolism. My father was built the exact same way." She added that her body has changed since then: "I can't eat like that now... I have to try to eat healthily now."

Twiggy also reflects on the whirlwind nature of her sudden fame, saying modeling agencies would have rejected her for being "too short" and "too small" if she'd approached them normally. Ironically, she says she actually longed for a curvier figure like singer Connie Francis, noting, "If you're bigger, you want to be thin. If you're thin, you want to be curvier."

The documentary also traces the origin of her iconic pixie cut, which came about by accident.

“It was serendipity, because I went to a salon to have my hair styled, and Leonard, the hairdresser, saw me and said, ‘Can I cut your hair?’ ” she recalled. “The funny thing was, I didn’t want my hair cut, because I was a mod, and I liked it long and parted in the middle.”

She continues, “Because I was so timid and in this posh Mayfair salon, I was too shy to say no to him!”.

Twiggy is available now on VOD and DVD.