Claim: Sienna Miller is a person who acts.

Sienna Rose Diana Miller -LRB- born 28 December 1981 -RRB- is a British-American actress , model , and fashion designer .   In 2008 , she was nominated for the BAFTA Rising Star Award , while for her role as Tippi Hedren in the 2012 TV film The Girl , she was nominated for a BAFTA TV Award for Best Actress and a Golden Globe Award for Best Actress . Her film roles include the crime thriller Layer Cake -LRB- 2004 -RRB- , the comedy Alfie -LRB- 2004 -RRB- , the biopic Factory Girl -LRB- 2006 -RRB- , the drama The Edge of Love -LRB- 2008 -RRB- and the military science fiction action film G.I. Joe : The Rise of Cobra -LRB- 2009 -RRB- . In 2014 , she starred in two biographical dramas , Foxcatcher -LRB- 2014 -RRB- , playing Nancy Schultz , and American Sniper -LRB- 2014 -RRB- , portraying Taya Renae Kyle .