Kaitlyn "Kate" Melton (born June 23, 1992) is an American actress. Her biggest role to date has been as Daphne Blake in two Scooby-Doo live-action prequel films, Scooby-Doo! The Mystery Begins and Scooby-Doo! Curse of the Lake Monster. 

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https://en.wikipedia.org/wiki/Kate_Melton