Rumer Willis  slipped into a very revealing silver gown Paris- Arabstoday It might be the night Tallulah Belle Willis made her debut as a member of high society, but it was her older sister who stole the attention. Stepping out to support the 17-year-old, Rumer Willis stole the attention at Le Bal des Debutantes with her daring dress which plunged down to her navel. The 23-year-old actress tweeted a picture of herself at the high society event in Paris, posing alongside her siblings Scout, 20, and 17-year-old Tallulah, who one of the debutantes at the ball. Tallulah, who was also joined by her father Bruce Willis, went for a more demure look in a black and silver sequinned gown by Lanvin while Scout slipped into a red dress. But it was Rumer who turned heads, boldly wearing her ensemble without a bra at the upper class soiree. One notably absentee was Demi Moore, who no doubt didn't want to overshadow her daughters after being thrust into the media spotlight last week after announcing her intention to divorce Ashton Kutcher.