Samantha Smith is an American actress. She is best known for her role as Mary Winchester on Supernatural. In 1996, she debuted with a small role in the film Jerry Maguire. That same year, she also had her first TV appearance in an episode of Seinfeld. Later, she played the lead in the 1998 movie The Truth About Juliet. At the same time, she played recurring roles in Two of a Kind and Profiler. Since 2005, she’s played the recurring character Mary Winchester in Supernatural. Her other film credits include What Planet Are You From?, Dragonfly, Transformers, The Chosen One, The Devil’s Dolls, and Stephanie.