Griffiths was born on May 14, 1997 in Cedar City, Utah. His first acting role came when he was 6 years old, when he participated in a version of William Shakespeare's A Midsummer Night's Dream.
Griffiths' family later moved to the Issaquah/Sammamish area. While attending Skyline High School, Griffiths played as a defensive lineman for the varsity football team. He also played defensive line while attending Montana State University.
In 2010, Griffiths got his first major role, when he was selected to play the role of Charles Kaznyk, in Super 8, directed by J. J. Abrams and produced by Steven Spielberg. While attending Montana State University, Griffiths was a defensive linemen for the Bobcats’ football team. He has expressed interest in working behind the scenes on film.

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