Jean Dujardin beats George Clooney for best actor and Mary Tyler Moore receives lifetime achievement award at the 18th Annual Screen Actors Guild Awards; Sofia Vergara and Meryl Streep have fun with friends at the Weinstein Company and Dewar's post-SAG Awards cocktail party at the Chateau Marmont; Amber Heard dazzles fans on the red carpet as Kelsey Grammer hosts the 64th Annual Directors Guild of America Awards; Katy Perry and professional party girl Paris Hilton kick off the grand opening of 1 OAK Las Vegas;

Soho House hosts the first ever Australian Academy Of Cinema And Television Arts International Awards Ceremony with Nicole Kidman and Russell Crowe; Rihanna and Chris Tucker come out for Cirque Du Soleil's Michael Jackson "The Immortal" World Tour opening night—There were definitely plenty of events going on around Los Angeles this weekend and we have your coverage in this edition of Last Night's Parties!

[Clockwise from left: DGA photo via; Berenice Bejo, Michelle Williams , Sofia Vergara, Jesse Tyler Ferguson via]

Paris Hilton Nicole Kidman Nicky Hilton Scott Sartiano 1 OAK Katy Perry Taye Diggs Meryl Streep Jane Krakowski Cheyenne Jackson kevin bacon Travis Barker tina fey Michelle Williams Perez Hilton Balthazar Getty Harvey Weinstein Angelina Jolie Rihanna Alan Cumming Jennifer Aniston michael jackson Jonah Hill Rose Byrne Colin Hanks Geoffrey Rush Emily Blunt Chateau Marmont Patrick Duffy Russell Brand Katrina Bowden Jessica Lange david arquette Viola Davis Michael Cuesta chris lowell George Clooney Glenn Close Rumer Willis Jon Favreau Maria Menounos BJ Novak Kyra Sedgwick Brad Pitt John Krasinski Maya Rudolph Ashlee Simpson lea michele Quincy Jones Heather Tom Zoe Saldana Kathy Bates Julianna Margulies Kelsey Grammer Adam Gregory Russell Crowe Amber Heard Patricia Arquette Kelly Osbourne Gretchen Mol Shenae Grimes Caitlin Moe Stacy Keibler Ken Howard Jane Lynch Matthew Morrison Kevin Zegers Jaime King Helen Mirren Armie Hammer Michael K. Williams Kristen Wiig Josh Brolin Regina King Shailene Woodley Fred Savage Dianna Agron michael c. hall Keith Urban Busy Phillips Greg Kinnear Paz Vega Julie Bowen Emma Stone Christopher Plummer michael pitt Jon Cryer Deborah Ann Woll scott disick Shaun Robinson Liam Hemsworth Cirque du Soleil Weinstein Company Bryan Cranston Aaron Paul Anna Gunn Betsy Brandt Dean Norris Soho House