Galadriel Stineman (born Margaret Elizabeth Galadriel Stineman; October 20, 1990) is an American actress and model. She is best known for her roles as Gwen Tennyson in Ben 10: Alien Swarm and as Cassidy Finch in The Middle. Stineman moved to Los Angeles after graduation and made her debut in Fame (2009) as a dancer. Her breakthrough came when she portrayed Gwen Tennyson in Ben 10: Alien Swarm (2009), a science fiction action film by Alex Winter based on the Cartoon Network animated series Ben 10: Alien Force. She was the second actress to play the part of Gwen. Stineman had been involved in major projects since 2009. She played Audra in Junkyard Dog (2010) and Cassidy in The Middle (2012-14). Stineman portrayed the character Ashley in Until Dawn (2015), an action survival horror video game developed by Supermassive Games and published by Sony Computer Entertainment for the PlayStation 4.

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