Jonathan Lippert Keltz (born January 17, 1988)^[2] is an American actor known for his role as Jake Steinberg in the HBO series Entourage,^[3][4][5] and his work in the films Prom (2011) and 21 & Over (2013).^[6][7][8] He starred as Leith Bayard in The CW's series Reign. In May 2014, Keltz was promoted to series regular for the show's second season, which premiered in October 2014.^[9]

Keltz was born in New York City, the son of Karin Lippert, who worked in public relations, and Martin Keltz, who is a co-founder of Scholastic Productions.^[10]

After moving to Canada with his family, he attended high school^[11] at the Northern Secondary School in Toronto, Ontario. His father is of Polish Jewish descent, while his mother is German (born in Hamburg).^[12] Keltz was raised in his father's Jewish religion.^[11][13][14]

Keltz began taking acting classes when he was 10 years old and began working as an actor when he was 16.^[11] In Toronto, he lived in an apartment once occupied by Keanu Reeves.^[8] Keltz currently lives in Los Angeles, California,^[7] while his parents reside in Toronto.^[11]

June 1, 2011, Keltz was reported as wrapping filming of the final season of Entourage.^[11] His new projects at that time included the 2011 films Prom, released in April 2011 by Disney, in which he played the role of Brandon Roberts, an oblivious but self-confident teen preparing for his school's prom night,^[7] the completed horror film Playback, in which a group of high school students unwittingly unleash an evil spirit that destroys its victims through video playback,^[15] and the film Transgression.^[7]