Michaela Dietz

Michaela Dietz is a Korean-American actress and singer whose professional career started in 2005. She is known for playing the role of Riff on the PBS children's television series Barney & Friends and as the voice of Amethyst on the Cartoon Network television series Steven Universe. 2Early life Dietz was born in South Korea, adopted, and raised in Cooperstown, New York. She studied International Studies at Middlebury College. She has spoken about how her experience as an adoptee informs her performance as Amethyst on Steven Universe. 2Career Dietz has voiced ongoing characters in two American children's animated TV series, Riff in Barney & Friends and Amethyst in Steven Univers