Stephanie March is an American actress. She started her Hollywood career in the mid-1990s debuting on the TV series Early Edition. In the 2000s, she became known for her starring role as ADA Alexandra Cabot on Law & Order: Special Victims Unit. In 2003, she made her big screen debut in the film Head of State. She next appeared as Julie in the movie Mr. and Mrs. Smith. Subsequently, she starred in the movies Flannel Pajamas, The Treatment, and Falling for Grace. She currently reprised her role as ADA Alexandra Cabot in the new season of Law & Order: Special Victims Unit. In the 2010s, she had performances in the films Why Stop Now? and Innocence.