Katherine McNamara is an American teen actress and singer, best known for playing the role of Myra Santelli in the Disney Channel original movie Girl vs. Monster. She is set to appear as Harper in the upcoming MTV series Happyland.
Katherine McNamara guest starred on shows including Drop Dead Diva and 30 Rock. She was also in some movies such as New Years Eve. She is also set to star in the "Tom Sawyer and Huckleberry Finn" movie remake. She was cast as Cherry O'Keefe for the High School Musical spin-off Madison High, but the show was not picked up.
McNamera became popular in 2012 for her Disney Channel appearances. She appeared on the Disney XD show Kickin' It, in which she had a recurring role as Claire, Kim's rival, as well as appearing as Myra Santinelli in the Disney Channel movie Girl vs. Monster, alongside Kickin' It co-star and friend Olivia Holt.
She also appeared in two episodes of Jessie, playing Bryn Brietbart, as well as an episode of the new Nickelodeon series The Thundermans. She also appeared in the independent movie Contest.