Louise Roe, Mischa Barton, Terri Seymour, and a heap of other celebs came out to the launch of The 7th Annual BritWeek Festival; Marissa Kraxberger, Julie Bowen, and others step out to celebrate Oscar de la Renta's "Sophie Dress" with author Kelly Florio Kasouf; Dana Carvey, Mike Myers, and Lorne Michaels hit the "Party time! Excellent!" reunion for Wayne's World; Felicity Huffman, Cloris Leachman, Nancy O'Dell and other stars walk the red carpet for the 56th Annual Genii Awards; David Arquette, Shiva Rose, and more celebrate Balthazar Getty's record release at Bootsy Bellows—get the lowdown on Tuesday's top L.A. events in this installment of Last Night's Parties.

The Guest List

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Oscar De La Renta• Baby Buggy• Balthazar Getty• Lady Victoria Hervey• Cloris Leachman• david arquette• Lorne Michaels• Markus Molinari• Mischa Barton• Mark Wahlberg• eric dane• Nia Vardalos• Claiborne Swanson• Mike Myers• Julie Bowen• Tia Carrere• Soleil Moon Frye• Antonio Villaraigosa• Louise Roe• Nancy O'Dell• Lisa VanderPump• Shiva Rose• Rob Lowe• "Downtown" Julie Brown• Jacob Diamond• Terri Seymour• Penelope Spheeris• Felicity Huffman• Bree Turner• Mark Steines• AMPAS Samuel Goldwyn Theater• Samantha Mumba• Allegra Riggio• Elizabeth Street• Marissa Kraxberger• The Academy• Joanna Cassidy• Colleen Camp• Bruno Tonioli• Dame Barbara Hay• Shannon Rotenberg• Helen Kinnear• Dana Carvey• K!O• Skirball Cultural Center• Bootsy Bellows• Sophie Winkleman• Timothy Dalton• Sarah Jane Morris• The Launch Of The Seventh Annual BritWeek Festival "A Salute To Old Hollywood"• BritWeek Festival• The Seventh Annual BritWeek Festival• The Seventh Annual BritWeek Festival "A Salute To Old Hollywood"• "A Salute To Old Hollywood"• Clark Mallon• Sean Yazbeck• Frederick Windsor• Blake Graves• Bruce Reynolds• Lara Pulver• Sebastian Knapp• Oscar de la Renta And Elizabeth Street Celebrate "The Sophie Dress" With Author Kelly Florio Kasouf To Benefit Baby Buggy• Oscar de la Renta "The Sophie Dress"• "The Sophie Dress"• Oscar de La Renta Boutique• Kelly Florio Kasouf• Tara Swennen• Natalia Safran• Stella Jean Saliman• Julie Moran• Victoria Recano• Julia Franz• Staci Koondell• Stephanie Mork• The Academy Hosts A "Wayne's World" Reunion...No Way. Way.• "Wayne's World"• "Wayne's World" reunion• Lara Flynn Boyle• Kevin Pollak• Brian Doyle-Murray• 56th Annual Genii Awards• Erica Olsen• Carolina Sarassa• James V. Bickford IV• Lisa Christiansen• Jessica Smith• Gabrielle Loren• Nia Peeples• Balthazar Getty Record Release Party For "Solardrive" And Launch Of New Record Label Purplehaus• "Solardrive"• Purplehaus• KO The Legend• Lil C• Richard Patrick• Ben Laski• Jonathan McHugh• Amyn Kaderali• Rosetta Millington• 7th Annual BritWeek Festival