Mary Mouser is best friends with her Cobra Kai co-star Tanner Buchanan. Tanner Buchanan is also known for his roles as Leo Kirkman in the ABC political drama Designated Survivor.
Mary Mouser began her career at the age of six when she was chosen as a photo double for Abigail Breslin’s character in Signs.
At the 2006 Best of Fest Awards at the KIDS FIRST! Film and Video Festival, Mouser received the Outstanding Performance Award for her voiceover work in Eloise: The Animated Series.
Mary Mouser was featured on the Starz Kids & Family series Eloise: The Animated Series as the voice of Eloise.
Mary Mouser was a voice actress in the audio drama series, Adventures in Odyssey as Samantha McKay, younger sister of Grady McKay.
Mary Mouser guest starred in Lie To Me and in Ghost Whisperer as the character Madison. Mouser has appeared on a Mind Field episode (S2 E5) on the channel VSauce on YouTube.