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.

Neil Patrick Harris, Rob Reiner and Busy Philipps host a fundraiser reception at The Hollywood Museum for one of L.A.'s oldest children's charities; Anne Heche helps open this year's International Beverly Hills Film Festival with a screening of one of the first feature films to be fully shot in post-invasion Afghanistan; Emmanuelle Chriqui and Peter Facinelli shop for charity on West 3rd Street; Luke Perry shows up to Nick Santora's book launch party at the Grove; despite the gloomy weather, Wednesday saw plenty of L.A.'s stars out and about. Read all about it in this edition of Last Night's Parties. More»