David Hewlett is an accomplished actor, writer and director.

His first appearance as Dr Rodney McKay was as a one-off guest star role in the Stargate SG-1 episode 48 Hours. He was subsequently invited back for the season six premiere Redemption, Parts 1 & 2 the following season. When the show's creators were casting the spin-off series Stargate Atlantis he was originally called in to read for a different role. However, he returned as McKay, this time a lead role in the series.

In addition to his role on Atlantis, highlights from David's television credits include guest-starring roles on ER, Without a Trace and The District, and recurring roles on Kung Fu: The Legend Continues, Beyond Reality and the Canadian hit series Traders, for which he received two Gemini nominations.

David’s writing and directing debut, A Dog's Breakfast, was recently picked up for distribution by MGM and Twentieth Century Fox. A Dog's Breakfast is a bone-jarring, head-smacking, feature-length comedy about marriage, madness and murder. David stars along with fellow Stargate Atlantis cast members Paul McGillion and Rachel Luttrell, as well as SG-1's Christopher Judge. The film also features his real-life sister, actress Kate Hewlett, and his wonder-dog, Mars.