Life & and CareerEdit
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. After moving to Canada with his family, he attended high school at the Northern Secondary School in Toronto. He was raised in his father's Jewish religion. He began taking acting classes when he was 10 years old and began working as an actor when he was 16. In Toronto he lived in an apartment once occupied by Keanu Reeves. He currently lives in Los Angeles, California. His parents reside in Toronto.
As of June 1, 2011, Keltz was reported as wrapping filming of the final season of Entourage. His projects include the 2011 film Prom, released April 2011 by Disney, in which he plays the role of Brandon Roberts, an oblivious but self-confident teen preparing for his school's prom night, the completed horror film Playback, in which a group of high school students unerringly unleash an evil spirit which destroys its victims through video playback, and the film Transgression.
|American Pie Presents: Beta House||Wesley|
|2013||21 & Over||Randy|
|The Privileged||Jeff Lynley|
|2004||Degrassi: The Next Generation||Nate|
|Radio Free Roscoe||Mark|
|2005||Queer as Folk||Lucas|
|Cold Case||Dom Barron '63|
|2010||CSI: Miami||Ben Wilcox|
|2011||Breakout Kings||Oliver Day|
|The Listener||Tyler Rooker|
|Combat Hospital]||Private Henry Flax|
|2012||Fairly Legal||Jacob Mathews|
|2013||Transporter: The Series||Clyde|
|Murdoch Mysteries||Ralph Bridgewater|
|2013–2014||Republic of Doyle||Grayson Mann|
|2013||Necessary Roughness||Darryl "Hutch" Hutchinson|
Jonathan Keltz has a photo and video gallery.
- He is said to have auditioned for Sebastian at first. 
- He is of Russian, Jewish, and German heritage.
- He is the only American actor on Reign.
- He doesn't have any facial hair, but his character Leith does.