About
Sienna Rose Diana Miller is an American-British actress who began her career as a model before transitioning to acting. She gained recognition for her roles in films such as "Layer Cake" and "Alfie" in 2004. Miller has portrayed a variety of characters throughout her career, including Edie Sedgwick in "Factory Girl" and Caitlin Macnamara in "The Edge of Love." She received a BAFTA Rising Star Award nomination in 2008.
Career Timeline
Acting debut
Miller begins her acting career.
"Layer Cake" and "Alfie"
Miller gains recognition for her roles in "Layer Cake" and "Alfie."
"Factory Girl" role
Miller portrays Edie Sedgwick in "Factory Girl," further increasing her profile.
BAFTA Rising Star nomination
Miller receives a BAFTA Rising Star Award nomination.
"G.I. Joe" Blockbuster
Miller appears in "G.I. Joe: The Rise of Cobra," a blockbuster film.
Increased media scrutiny
Miller experiences increased media scrutiny, impacting her career.
Broadway Debut
Miller makes her Broadway debut, expanding her experience.
Steady acting career
Miller continues to take on diverse roles in film and theater, maintaining a steady career as an actress.
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Last updated: February 20, 2026