Sienna Miller is an actress.
The Golden Globe Award for Best Actress -- Miniseries or Television Film is an award presented annually by the Hollywood Foreign Press Association ( HFPA ) . Sienna Miller . In 2014 , she starred in two biographical dramas , Foxcatcher ( 2014 ) , playing Nancy Schultz , and American Sniper ( 2014 ) , portraying Taya Renae Kyle .