Hollywood heavyweights of all ages including Jennifer Aniston, Jack Nicholson, Dakota Fanning, Meryl Streep and Julia Roberts step out to help honor Shirley MacLaine; Stephanie Pratt, Derek Hough and more single famous faces party with OK! Magazine at Roxbury; Jamie Chung, Taryn Manning and others hit E3 to support the fight against AIDS with a night of gaming; Vanessa Williams is honored at the Covenant House California's annual gala—it was yet another bustling Thursday across L.A. and we have the lowdown on who partied where in this installment of Last Night's Parties.

[All photos via]

Avalon Taryn Manning Melanie Griffith Meryl Streep Mena Suvari Dakota Fanning Jennifer Aniston Vanessa Williams Eric Mabius Ana Ortiz Steven Spielberg Annette Bening morgan freeman Jack Nicholson julia roberts katherine heigl Carrie Fisher Jamie Chung Derek Hough Warren Beatty Shirley Maclaine Sally Field Laura Prepon John Travolta Zelda Williams Avalon Hollywood Charlie Day Roxbury Peter Fonda Lee Baca Rex Lee Ali Fedotowsky Romi Klinger Sidney Poitier Jaimie Hilfiger Jessica Hall Natalie Getz Brea Grant Angela Simmons Mary Elizabeth Ellis Howard Stringer Amy Pascal Elizabeth McGovern CC Skye Briana Evigan Kiowa Gordon Sony Pictures Studios Pia Toscano Dennis Kucinich Siedah Garrett Chris Williams Debbie Matenopoulos Helen Williams Don Rickles Andrew Bowen Caitlin O'Connor Havana Brown Jason Evigan Chris Galya OK! Magazine's Sexy Singles Party OK! Magazine's Sexy Singles Party 2012 OK! Sexy Singles Party at Roxbury tephanie Pratt Stacie Hall Nadia Giosia Christina Cha Ana Mulvoy Leslie Birkland Bob Gazzale Wally Pfister 40th AFI Life Achievement Award Honoring Shirley MacLaine 40th AFI Life Achievement Award AFI Life Achievement Award 2012 The(RED)RUSH Games Party The(RED)RUSH Games Vincent Flood Rob Mayes Kip Force Jason Hemmons Dennis Shinn Al Shearer Dillon Casey Becky Poliakoff Covenant House California 2012 Awards Dinner Covenant House California 2012 Awards Covenant House California Awards Skirball Cultural Center Ivy Mabius Patricia Serio George Lozano George Peterson Lauri Peterson Michael Berden