Katherine Grace McNamara is an American film and TV actress and singer. She is best known for her role as Harper Munroe on the MTV comedy series Happyland.
For Disney, she played Myra Santelli in Girl vs. Monster, Claire on Kickin' It, and Bryn Breitbart in Jessie. She had a recurring role as Kat on ABC Family's The Fosters and is now starring on Freeform's series Shadowhunters.
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