Hollywood offspring Rumer Willis made a fashion faux pas on the red carpet of a charity event last night when she stepped out in a plunging black dress.

The 19-year-old daughter of actors Bruce Willis and Demi Moore left little to the imagination as she posed in an unflattering gown at the Power Of Paws launch party at the Helen Mills Gallery in New York.

The aspiring actress was clearly missing a bra as her skimpy dress just covered her youthful breasts.

I heard a Rumer you're not wearing a bra: Miss Willis's dress leaves little to the imagination as she arrives at the Power Of Paws charity event in New York

Her overexposed chest wasn't the only fashion mistake Rumer made last night - she also teamed her dress with garish yellow patent ballet pumps.

Joining Rumer at the party, which launched a new initiative to educate people of the health benefits of interacting with pets, was Paris Hilton's little sister Nicky.

Rumer has become a regular fixture on the red carpet in recent years and is regularly spotted at Hollywood nightclubs - despite being two years shy of the legal drinking age in California.

Strike a pose: Rumer Willis, in her garish ballet pumps,shows off her curves on the grassy carpet

After minor roles as a child alongside her parents in Striptease, Hostage and The Whole Ten Yards, Rumer is hoping to prove her acting chops in bigger roles in the upcoming movies The House Bunny, From Within and Wild Cherry.

Recently, the teenager hit back at internet gossips who criticised her prominent chin, which she inherited from her famous father.

At a press conference for The House Bunny, Rumer told US TV network E!: 'Everybody has an opinion, and we live in America so you're allowed to.

'As long as you are comfortable with who you really are and your friends, and the people that are around you know that, that's all that really matters.

'Hopefully, young girls will watch this and feel confident about themselves and go, "OK, that girl's not entirely the ideal of what a perfect picture is supposed to be and she feels confident and beautiful, then I can too". If we can have the ability to do that, I'm very excited about that.'

Furry friend: Rumer Willis gives photographers an eyeful as she bends down to stroke her new pal