Sienna Rosie Diana Miller (born December 28, 1981) is an American-born English actress. Born in New York City and raised in London, she began her career as a photography model, appearing in the pages of Italian Vogue and for the 2003 Pirelli calendar. Her acting breakthrough came in the 2004 films Layer Cake and Alfie. She subsequently portrayed socialite Edie Sedgwick in Factory Girl (2006) and author Caitlin Macnamara in The Edge of Love (2008), and was nominated for the 2008 BAFTA Rising Star Award. Her role as The Baroness in G.I. Joe: The Rise of Cobra (2009) was followed by a brief sabbatical from the screen amid increased tabloid scrutiny. Miller returned to prominence with her role as actress Tippi Hedren in the television film The Girl (2012), for which she was nominated for the BAFTA Television Award for Best Actress and the Golden Globe Award for Best Actress – Miniseries or Television Film. Further critical acclaim followed throughout the 2010s, with appearances in the films Foxcatcher (2014), American Sniper (2014), Mississippi Grind (2015), The Lost City of Z (2016), Live by Night (2016), and American Woman (2018), as well as the miniseries The Loudest Voice (2019).
TBAMadden as Carol Davis
TBAUntitled Jack Ryan Film as Unknown
TBASecret Daughter as Unknown
TBARaised Eyebrows as Erin Fleming
2025My Mother’s Wedding as Victoria
2025Twiggy as Self
2024Horizon: An American Saga - Chapter 2 as Frances Kittredge
2024Horizon: An American Saga - Chapter 1 as Frances Kittredge
2023Indomitable as Narrator
2023Extrapolations (3 Episodes) as Becca Shearer
2023Scandalous: Phone Hacking on Trial as Self
2022Chivalry (2 Episodes) as Lark
2022Anatomy of a Scandal (6 Episodes) as Sophie Whitehouse
2020Wander Darkly as Adrienne
2020War & Grace as Narrator
201921 Bridges as Frankie Burns
2019Gucci Cruise 2020 as Self
2019The Loudest Voice (7 Episodes) as Elizabeth 'Beth' Ailes
2018The Catcher Was a Spy as Estella Huni
2018American Woman as Deb Callahan
2018National Theatre Live: Cat on a Hot Tin Roof as Maggie
2018Die Clint Eastwood Story as Self
2017An Imperfect Murder as Vera Lockman
2017The Lost City of Z as Nina Fawcett
2016Live by Night as Emma Gould
2016The Tale of Thomas Burberry as Sara
2016So Good to See You as Frances
2015High-Rise as Charlotte Melville
2015Burnt as Helene
2015The Late Show with Stephen Colbert (1 Episode) as Self
2015Mississippi Grind as Simone
2015The Making Of 'American Sniper' as Self
2015One Soldier's Story: The Journey of American Sniper as Self
2015The Late Late Show with James Corden (1 Episode) as Self - Guest
2015Unfinished Business as Chuck Portnoy
2014American Sniper as Taya Renae Kyle
2014Foxcatcher as Nancy Schultz
2014Late Night with Seth Meyers (2 Episodes) as Self
2014The Tonight Show Starring Jimmy Fallon (4 Episodes) as Self
2014Off Camera with Sam Jones (1 Episode) as Self
2013A Case of You as Sarah Schipper
2013Just Like a Woman as Marilyn
2012Nous York as The Movie Star
2012The Girl as Tippi Hedren
2012Yellow as Xanne
20122 Jacks as Diana
2010Conan (1 Episode) as Self
2009The September Issue as Self
2009G.I. Joe: The Rise of Cobra as Ana Lewis / Baroness
2009The Tonight Show with Conan O'Brien (1 Episode) as Self
2008The Edge of Love as Caitlin MacNamara
2008Camille as Camille Foster
2008The Mysteries of Pittsburgh as Jane Bellwether
2007Stardust as Victoria
2007Interview as Katya
2007The Graham Norton Show (5 Episodes) as Self
2006Factory Girl as Edie Sedgwick
2005Casanova as Francesca
2004Alfie as Nikki
2004Layer Cake as Tammy
2003Keen Eddie (13 Episodes) as Fiona Bickerton
2003Jimmy Kimmel Live! (1 Episode) as Self
2002Top Gear (1 Episode) as Self
2002The American Embassy (1 Episode) as Babe
2001South Kensington as Sharon
2001Friday Night with Jonathan Ross (1 Episode) as Self - Guest
2001Bedtime (9 Episodes) as Stacey
2000Curb Your Enthusiasm (3 Episodes) as Sienna Miller
1997The View (1 Episode) as Self
1996The Daily Show (2 Episodes) as Self
1993Late Night with Conan O'Brien (2 Episodes) as Self - Guest
1993GMTV (1 Episode) as Self
1992The Tonight Show with Jay Leno (2 Episodes) as Herself
1988LIVE with Kelly and Mark (1 Episode) as Self - Guest
1978Top Gear (1 Episode) as Self
1952Today (1 Episode) as Self