Celebrity Parties: December 13 to December 19, 2013

01 of 10

Ben Stiller and Kristen Wiig

hit the carpet for a screening of their new film 'The Secret Life of Walter Mitty' in New York City, hosted by The Cinema Society and Brooks Brothers. Stiller directs and stars in the film about a day-dreamer who escapes from his daily life by disappearing into his own imagination. "If I'm focusing on something like a movie, it will take me away from reality, which is my own form of daydreaming," Stiller told InStyle.com

02 of 10

Justin Bieber

premiered his upcoming movie, 'Believe' at Regal Cinemas in Los Angeles. The film follows Bieber on his Believe tour where he speaks candidly about coming of age in the spotlight and features never-seen-before concert footage. The film opens in theaters on December 25th.

03 of 10

Leonardo DiCaprio and Jonah Hill

celebrated their new film 'The Wolf of Wall Street' during the premiere's after party presented by Giorgio Armani and Paramount Pictures. The film tells the true story of Jordan Belfort's rise as a wealthy stockbroker to his fall involving crime and corruption. The film opens everywhere on December 25th.

04 of 10

Alexa Chung

launched her Eyeko collaboration at Sephora in Manhattan. The style icon's set of limited edition eye make-up sets are now available online at eyeko.com and Sephora stores come January.

05 of 10

Julia Roberts and Meryl Streep

were all smiles at the premiere of 'August: Osage County' at Regal Cinemas in Los Angeles. Roberts (in Givenchy) and Streep (in Gucci) star in the movie adaptation of Tracy Letts' play opposite of Juliette Lewis, Julianne Nicholson, and more. The film opens in theaters on December 25th.

06 of 10

Uma Thurman

stepped out for Tibet House's 11th annual Benefit Auction at Christie's in New York City. Thurman is part of the event's honorary chair committee along with Martin Scorsese, Yoko Ono, and more. The organization aims to preserve Tibetan culture and serves as a cultural center both in New York City and online.

07 of 10

HRH Princess Beatrice and Eugenie of York

attended the 8th annual Charity Ball benefitting Charity: Water at the Duggal Greenhouse in Brooklyn, New York. The two royals are part of the host committee chairs including Lauren Bush Lauren, Sara Bareilles, and others. The event helped raise funds to bring clean water to developing nations.

08 of 10

Kim Basinger and Sylvester Stallone

came together for Tribeca Film Institute's Annual Benefit featuring the premiere of 'Grudge Match' at Ziegfeld Theater in New York City. Basinger (in Ralph Lauren Collection), Stallone, and Robert De Niro star in the film based on a pair of retired boxers who come out of retirement to fight one more match. The film opens in theaters on December 25th.

09 of 10

Gwen Stefani and Jessica Alba

made a family day out of the third annual Baby2Baby Holiday Party presented by Alba's brand, The Honest Company. The two mothers brought along their children and were also joined by fellow Hollywood mothers Busy Philipps, Michelle Monaghan, and more.

10 of 10

Katie Holmes

stepped out for the Z100's Jingle Ball concert held at Madison Square Garden in New York City to introduce Selena Gomez onto the stage. The concert also featured performances by Miley Cyrus, Ariana Grande, and more.