[2] Kelley started appearing in commercials and gained his first role in a movie when he was in first grade and became a member of SAG at the age of four.

He played a leading role in the movie Prayers for Bobby alongside Sigourney Weaver, which premiered in January 2009 on Lifetime.

The Contra Costa Times called Kelley's portrayal of Bobby Griffith a "stirring performance".

[8] In January 2012, Kelley was in the TV movie Sexting in Suburbia, with Liz Vassey and Jenn Proske.

[9] In 2014, Kelley joined the cast of the MTV show Teen Wolf as Jordan Parrish, a young deputy.