Mary Mouser, born Mary Matilyn Mouser on May 9, 1996, in Pine Bluff, Arkansas, is an American actress best known for her role as Samantha LaRusso in the hit Netflix series Cobra Kai. With a career that began in childhood, Mouser has built a reputation for her emotional depth, versatility, and engaging screen presence.

She started acting at the age of five, initially working as a photo double in the film Signs (2002). Mouser went on to voice the title character in Eloise: The Animated Series and appeared in a range of TV shows, including Life Is Wild, Lie to Me, and Body of Proof, where she played Lacey Fleming, the daughter of Dana Delany’s character. She also portrayed Karen Grant, the president’s daughter, in Scandal.

Her breakout role came with Cobra Kai (2018–2024), where she plays Sam LaRusso, the daughter of Daniel LaRusso from the original Karate Kid films. Mouser’s performance, blending martial arts action with coming-of-age drama, helped solidify her as a central figure in the modern continuation of the beloved franchise.

Off-screen, Mouser has been open about living with type 1 diabetes since her diagnosis in 2009, using her platform to raise awareness and support for others. She’s also active on social media and YouTube, where she shares behind-the-scenes content and personal reflections.

With a blend of talent, relatability, and advocacy, Mary Mouser continues to be a rising star with a bright future in both television and film.