Kate Beckinsale, Hayden Panettiere, Chelsea Handler and others party in a VIP room at The Rolling Stones STAPLES Center show; Zach Galifianakis, Bradley Cooper, Heather Graham and costars hit the L.A. premiere of The Hangover Part III in Westwood; James Gandolfini and Cristine Prosperi celebrate the premiere of Nickelodeon's Nicky Deuce; stars of "Arrested Development" meet fans outside the famous Bluth frozen banana stand—get the rundown on Monday's top events in this edition of Last Night's Parties.

Kevin Bacon, Kyra Sedgwick, and Natalie Zea walk the red carpet at a screening event for "The Following"; Portia de Rossi, Jason Bateman, Will Arnett and the rest of the Bluth clan celebrate the Season 4 premiere of "Arrested Development" (!!!) and we could not be more excited; Judd Apatow, Carl Reiner, and Mel Brooks kick off #ComedyFest; Roxane Mesquida, Josephine de la Baume, and others hit a special screening for Kiss of the Damned; Princess Alexandra Von Furstenberg, Angella Nazarian, and more attend the Women A.R.E. Salon event—get the rundown on Monday's top events in this installment of Last Night's Parties.

Willie Nelson performs for Miranda Kerr, Orlando Bloom, Emmy Rossum and more at Global Green USA's Pre-Oscar bash; Jennifer Lawrence, Bradley Cooper, Amanda Seyfried, Anne Hathaway and many more notables attend two separate Vanity Fair Campaign Hollywood events at Chateau Marmont and Eveleigh; Jessica Chastain, David O. Russell and others attend TheWrap's annual pre-Oscar party; David Arquette, Kate Upton, and Topher Grace are among the guests at The Art Of Elysium's Pieces Of Heaven Auction—get caught up on Wednesday's top L.A. events in this installment of Last Night's Parties.

[Jeremy Plager, Gerard Butler, Alan Siegel] [Paul Guevara, Stacy Kessler, Peter Davis]

Last night in NYC, Chrysler and the Cinema Society hosted Gerard Butler and Jessica Biel for the premiere of FilmDistrict's "Playing For Keeps," Sarah Jessica Parker attended the New 42nd St Gala honoring the Australia Council for the Arts, Nate Berkus helped raise funds for Animal Haven, and more!

[Jessica Biel] [Gabriele Muccino, Gerard Butler]

Last night, Jessica Biel and Gerard Butler stepped out for the NYC premiere of their new film "Playing For Keeps" hosted by Chrysler and the Cinema Society. Jessica owned the red carpet in a floor length Versace gown with a deep plunging neckline. After the film screening, Biel changed from her flowy frock into a sea green cocktail dress and headed to the after party at PH-D at the Dream Hotel with Justin Timberlake where the newly weds sipped Vikingfjord cocktails with the rest of the cast. Check out more photos from inside the party below. More»

Stylish ladies of the big and small screen Mandy Moore, Elizabeth Banks and Maria Menounos join Dannijo and Tucker for tea in Beverly Hills; Chris Colfer signs copies of his new children's book at The Grove; Connie Britton and Hayden Panettiere gush over new show "Nashville" as part of TCA Summer Tour—get your last event roundup before the weekend festivities begin in this installment of Last Night's Parties. More»

J.J. Abrams and his wife Katie McGrath team up with Coach to host a star-studded Santa Monica rooftop fundraiser with big names including Joss Whedon, Jeremy Renner, Kristen Bell and Timothy Olyphant; Christinia Milian and Corey Feldman take in a classic Slick Rick performance at the Music Saves Lives benefit; Jerry Bruckheimer and former Congresswoman Gabrielle Giffords (alongside her astronaut husband) are honored at the Simon Wiesenthal Center's annual National Tribute Dinner at the Beverly Hilton; Kristin Davis hosts a high-end silent charity auction for designer handbags at a Beverly Hills manse once inhabited by Brad & Jen. There was plenty of high-end, charitably-minded fun going on last night, so make sure to check out all the action in this Thursday edition of Last Night's Parties!

Jeremy Renner & Olivia Munn at the Coach Children's Defense Fund Benefit at Bad Robot [via] More»

Last night in NYC, Anna Wintour joined other fashionistas at the launch of Claiborne Swanson Frank's book American Beauty, Emma Roberts and Anna Faris attended Juicy Couture's fall 2012 presentation, Joe Fresh celebrated the opening of his global flagship store with Mayor Bloomberg, Longchamp and Paper Magazine celebrated spring in SoHo, and so much more! Last night's parties were all about the new collections. More»

Ed Helms, Jason Segel and Susan Sarandon attend the premiere of their new movie Jeff, Who Lives At Home, at the Directors Guild of America; Hollywood couple Felicity Huffman and William H. Macy are inducted into the Hollywood Walk of Fame; Katey Sagal greets fans at the PaleyFest 2012 "Sons Of Anarchy" panel—it was another action-packed Wednesday here and we have all the details on the events that went down in Los Angeles and the notables who attended in this installment of Last Night's Parties! More»

Vanity Fair hosts an Oscar Party worthy of the entertainment gods; Kim Kardashian attends Elton John's glamorous Academy Awards viewing party; Petra Nemcova steps out for The Weinstein Company's Oscar after party; Pharrell Williams and Esperanza Spalding enjoy themselves at Hans Zimmer's post-awards show fete; Jean Dujardin gets his Oscar engraved at the Governors Ball—Awards season wasn't officially over until the Academy Awards after parties ended in the wee hours of this morning and we have  the details on the hottest events of the evening in this installment of Last Night's Parties, Oscar Night Edition! More»

You know how when you're a kid, you always want to sit with the grown-ups at the big table, but then when you get there you realize that the kids' table was more fun to begin with? That's kind of the deal with the Oscars after party scene, also. Sure, it's a great honor to get invited to the show and the subsequent "Governor's Ball," but there's a reason why the Academy finally scuttled the sit-down dinner element of the Ball for a more streamlined cocktail-party this year: because people kept leaving early to go to all the other parties, including the perpetually star-studded Vanity Fair gala at the Sunset Tower. More»