Alexandra Adi (born April 13, 1971) is an American actress. Born in Florida and raised in Upstate New York, Adi resides in Los Angeles with her husband, former Sapient executive Jerry A. Greenberg.

Adi has appeared in both independent and mainstream films, including American Pie, Jawbreaker, and Slap Her... She's French. Most recently, she starred in the comedy Dealing (2012). She also appeared on a number of TV shows, including Boy Meets World, CSI: Miami, and her biggest role being on the sitcom Step by Step (seasons 6–7) where she played J.T.'s girlfriend Samantha "Sam" Milano.