taylor swift made her acting debut in which film?

Taylor Swift made her feature film acting debut in the 2010 ensemble romantic comedy film "Valentine's Day," where she played the character Felicia, the girlfriend of a high school jock. This was her first on-screen film role, distinct from her earlier guest roles on television. Prior to this, she had a guest appearance on the TV show "CSI: Crime Scene Investigation" in 2009, but "Valentine's Day" marks her debut in a film role.