Haley Alexandra Tju (born February 15, 2001) is an American actress. She is known for her roles as Marcy Wu in the Disney Channel animated series Amphibia, Nu Hai in the DreamWorks Animation series, Kung Fu Panda: The Paws of Destiny, Pepper in the Nickelodeon television series Bella and the Bulldogs and Stella Zhau in the Nickelodeon animated series The Loud House.