Jon Hamm, Nina Dobrev, Christina Hendricks, Elisabeth Moss, Ian Somerhalder and other TV stars hit PaleyFest 2014; Joe Biden speaks at the Human Rights Campaign Los Angeles Gala Dinner; Emma Roberts, Jaime King, and Emmy Rossum celebrate Sandro Paris at Chateau Marmont; Beth Behrs and Kat Dennings help honor Steve Martin at The Geffen Playhouse—catch up on L.A.'s top events of the weekend in this edition of Last Night's Parties.

The Guest List

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Byrdie Bell• Emma Roberts• Amaury Nolasco• Hilary Rhoda• Emmy Rossum• Cody Horn• Steve Martin• Chateau Marmont• Joe Biden• Cat Cora• anjelica huston• Lawrence Bender• Carrie Fisher• Vincent Kartheiser• Jaime King• Kat Dennings• Courteney Cox• Anna Kendrick• Jon Hamm• Cheryl Hines• Elisabeth Moss• Mel Gibson• Christina Hendricks• Nina Dobrev• Ian Somerhalder• Paul Wesley• Jessica Gomes• Brie Larson• Antonio Villaraigosa• Jesse Tyler Ferguson• George Kotsiopoulos• Kiernan Shipka• PaleyFest• Meredith Baxter• George Takei• Jessica Pare• Jena Malone• Claire Holt• Beth Behrs• Rachael Leigh Cook• Bob Iger• Alan Horn• Phoebe Tonkin• Willow Bay• Bryan Callen• Caren Brooks• Ray Liotta• Anne Jeffreys• Peter Paige• Justin Mikita• Annabelle Wallis• Wendy Greuel• Calvin Harris• Kamala Harris• Evan Peters• Paris Barclay• Mike Shinoda• Geffen Playhouse• Zoey Deutch• Dolby Theatre• Danielle Campbell• Chester Bennington• JW Marriott Los Angeles at L.A. LIVE• Robert Kennedy• Langley Fox Hemingway• Human Rights Campaign Los Angeles Gala Dinner• Ariel Vromen• Bob Newhart• Leah Pipes• Charles Michael Davis• Joan Kors• John Ridley• Johnny McDaid• Project LA VIP Malibu Brunch• Sandro Paris Celebration in Los Angeles• The Geffen Playhouse 'Backstage At The Geffen' Annual Fundraiser Honoring Steve Martin And Alan Horn• Seah Hayes• 2014 PaleyFest: "The Vampire Diaries" & "The Originals"• Persia White• 2014 PaleyFest: "Mad Men"• An Evening Of Environmental Excellence Presented By The UCLA Institute Of The Environment And Sustainability• Jill Biden Chad Griffi• PaleyFest 2014