SCOUT Willis made waves when she supported the Free The Nipple campaign by walking topless through the streets of New York.
Demi Moore and Bruce Willis' daughter attended a London gallery opening rocking a semi-sheer dress which she opted to go braless beneath.
The 23-year-old's nipples were visible beneath the nude slip, but they had to fight for attention – as Scout had decided not to shave her underarms.
Tufts of dark hair sprouted from Scout's armpits, and were on show thanks to her barely-there vest.
The artist, who is the sister of Rumer and Tallulah, is very vocal about her feminist beliefs, as evidenced by her support for Free The Nipple.
She also pointed out that what is legal on the streets of New York City is against the rules on Instagram.
Scout has taken a series of nude self-portraits for the 8x8 exhibition in Hoxton Gallery.