Last night in NYC, Diane Kruger stepped out onto the red carpet with husband Joshua Jackson for "The Host" premiere, the Ace Hotel hosted an intimate dinner for Roman & Williams, Galore Magazine celebrated its new "Women Who Rock" Issue at Le Bain, and so much more!

Adrian Grenier, Heather Graham and more celebrate next month's Tribeca Film Festival; Gerard Butler, Aaron Eckhart, Ashley Judd and Morgan Freeman hit the red carpet at the premiere of Olympus Has Fallen; Emilia Clarke, Peter Dinklage, Lena Headey and other stars of HBO's "Game of Thrones" step out for the Season 3 premiere; Ryan Seacrest, Emmy Rossum, Nikki Reed and more join Justin Timberlakee at his 20/20 album release party—Monday was buzzing with star-studded events and we have the rundown on them all in this installment of Last Night's Parties.

Last night in NYC, James Franco hit up the NYC screening of his new film "Oz The Great and Powerful" with long-time friends Petra Nemcova and Emmy Rossum, Leelee Sobieski and Peter Brant helped kick off the Art Show with the Gala Preview hosted by the Art Dealers Association of America, Tina Fey joined co-star Paul Rudd at the premiere of "Admission," and so much more!

Last night in NYC, Sarah Jessica Parker and Matthew Broderick came out for the Academy of the Arts Lifetime Achievement Awards to benefit Guild Hall of East Hampton, Sotheby's + Dolce & Gabbana hosted a cocktail party for Thursday's Passion + Transmission: International Contemporary Art sale, AHAlife founder Shauna Mei held a dinner party for International Women's Day Dinner with Fern Mallis and Renata Black, and so much more!

Last night in NYC, Swedish House Mafia kicked off their 5-day takeover with the Black Tie Rave at the Hammerstein Ballroom, Ben Pundole hosted a party at ACME to celebrate the launch of his new comprehensive travel site, A Hotel Life, Jessica Hart and Peter Brant Jr. attended the Child Mind Institute Art Auction at Sotheby's, and so much more!

David Duchovny and Ed Harris walk the red carpet at the premiere of Phantom; Lea Michele, Cory Monteith and Jane Lynch help honor Ryan Murphy at The Paley Center for Media; Mario Lopez, Alessandra Ambrosio attend the opening night of Cavalia's "Odysseo" horse and man theatrical arts show; Mark Wahlberg and Diddy Sean Combs unveil, AQUAhydrate, their new brand of water they claim is the cure to hangovers after a late night of drinking Ciroc (*as if!!!*); Anne V, Louise Roe, Selita Ebanks and others celebrate designer Rachel Roy with a dinner party at the Mondrian—we're completely serious about the Marky Mark-Diddy anti-hangover water so feast your eyes on that reality and everything else from Wednesday 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.

Anne Hathaway and Dylan McDermott step out to support Jane Fonda and the One Billion Rising campaign kickoff; Kate Bosworth, Demi Lovato and Blood Orange take over The Grove for the grand opening of Topshop Topman; Naomi Watts, Robin Tunney, friends and family celebrate Simon Baker's star on the Hollywood Walk of Fame; fans fill the house at the Nokia Theatre to see Ne-Yo, T.I., and other acts perform at the Power 106 Valentine's Crush show—catch up on Thursday's action across L.A. in this installment of Last Night's Parties.

[Darren LeGallo, Amy Adams] [Brad Pitt, Sam Taylor-Johnson, Aaron Taylor-Johnson] [Terry Richardson, Heidi Mount]

Last night in NYC, Brad Pitt and James Gandolfini stepped out for a screening of their new film "Killing Them Softly," Raekwon performed at the Gallery at Dream Downtown for The Cools' Cyber Monday celebration, David LaChapelle's new exhibition, "Still Life" opened at Paul Kasmin Gallery, and more!

Go HERE for more photos by Mallory Turner and tag yourself and your friends!

Born and bred New Yorker Lena Dunham takes on L.A. with her new film, Nobody Walks, which premiered Tuesday night at the Arclight in Hollywood. Following major feats and recognition with the success of HBO's "Girls," the event turned out some of Hollywood's brightest in the industry, including Amy Heckerling, Malin Akerman, and Dylan McDermott.

Chateau Marmont via, Malin Akerman

Christina Milian and Taryn Manning get down at the Ubisoft launch party of "Just Dance 4" video game; Malin Ackerman, Nicky Hilton, Lena Dunham, and Olivia Thirlby show up for the Premiere of Nobody Walks at the ArcLight in Hollywood, just a few minutes away from the Kingdom Come premiere where Rachael Leigh Cook, Dania Ramirez, and Jennie Garth were spotted; Quincy Jones is honored by the Montblanc De La Culture Arts Gala hosted at Chateau Marmont; Empire Magazine throws a launch celebration at Sunset Tower; Dwight Howard and Ellen Pompeo celebrate a new European TV channel in the States—find out what you missed last night in this premiere-packed edition of Last Night's Parties.