Molly Sims, Kelly Osbourne, and Portia de Rossi celebrate with Stella McCartney at the Fourth Annual Autumn Party; Jane Fonda, Natasha Bedingfield, and Diane Lane step out for the Oceana Partners Award Gala; Rebecca Romijn, Alicia Silverstone, and Jerry O'Connell premiere Ass Backwards at The Vista; Ahna O'Reilly, Michelle Trachtenberg, Hannah Bronfman, and more dance at the cemetery for UNICEF's 1st Annual Masquerade Ball; Jessica Alba, Rashida Jones, and Brad Goreski party with Kenzo for the release of "Kalifornia"—read up on Wednesday's top events in this edition of Last Night's Parties.

Melanie Griffith Natasha Bedingfield HBO Erika Christensen Harvey Weinstein Jenny Lewis Jessica Alba Cash Warren Oceana Erin Wasson Rashida Jones Jane Fonda Rose McGowan Sky Nellor Alicia Silverstone Kathy Griffin Portia De Rossi Robert F. Kennedy Jr. Molly Sims Liz Goldwyn Maria Menounos Kathy Hilton Rick Hilton June Diane Raphael Kelly Osbourne Jerry O'Connell Devon Aoki Lisa Love Carly Simon Patrick Wilson China Chow Christos Garkinos Cheryl Hines Perrey Reeves Brad Goreski Sam Trammell Kelly Lynch Richard Perry Dean Norris Miranda July Daryl Wein Zoe Lister Jones Gillian Jacobs Diane Lane Ted Danson Nina Clemente George Kotsiopoulos Total Freedom Rebecca Romijn Brian Bowen Smith Vista Theatre Gia Coppola Jacqui Getty Nathalie Love Ralph Pucci Laura Dern Carrie Brownstein Humberto Leon Hannah Bronfman Mariko Munro Norman Lear Nick Kroll Cobie Smulders Constance Zimmer Eric Ladin Katy Ladin Kenzo Carol Lim Angela Kinsey Rachael Harris David Wain Casey Wilson Majandra Delfino Katie Aselton Paul Scheer Sandy Martin Emily Osment Scottie Thompson Brendan Fallis The Beverly Hilton hotel Sarah Chalke Christine Chiu Ellie Stuart Hunter Ahna O'Reilly Mary Steenburgen Bridget Regan Eugene Sadovoy Melissa Rauch Frederic Prinz von Anhalt Jorja Fox Doug Benson Tommy Torres Zach Cregger Anastasia Griffith Anita Patrickson The Berrics Robert Kennedy Ass Backwards kelela