Sienna Miller and Pippa Middleton kept the good times going at last night's All Saints and Too Many Women charity dinner at London's Petersham Nurseries. Pippa was decked out in a long-sleeved, floral gown from Danni Minogue's Project D line to lead everyone out onto the dance floor with her friend, Katie Readman, who works for one of the Middleton's favorite labels, Issa. Sienna managed to have lots of fun while hanging out at her table with model Lily Donaldson, her mom Jo Miller, and Rolling Stone Ronnie Wood. It was Jo's birthday, and she got a big kiss from Ronnie as a present. Sienna, wearing a dress from Matthew Williamson, also cozied up to China Tang owner David Tang and was seen laughing and throwing her hands in the air throughout the meal. The event brought out luminaries like Sarah Ferguson; Prince Harry's ex, Florence Brudenell-Bruce; and actress Gemma Arterton. A great deal of money was raised for the Breakthrough breast cancer charity after items, like private cooking lessons at Gwyneth Paltrow's home, were auctioned off for the cause. Guitar lessons with Ronnie went for $30,000, and a dinner date with Scarlett Johansson was a bidder's for about $20,000!