Greg MacLennan, originally from Ottawa, Ontario, is a feature film editor based in Austin, Texas.
"[8] This encounter led to Koontz inviting MacLennan to edit the western horror film The Pale Door.
[14][15] In 2020, MacLennan also edited the short Seek directed by Aaron Morgan and written by the host of Stephen King-focused podcast "The Kingcast," Eric Vespe, which premiered at Fantastic Fest in 2021.
[16] The horror short featured practical visual effects by two-time Academy Award nominee Arjen Tuiten (Wonder, Pan’s Labyrinth, and Ghostbusters: Afterlife).
The film editor teamed up with director Steven C. Miller for the 2022 smart-home horror film Margaux, starring Madison Pettis, Vanessa Morgan, and Jedidiah Goodacre as a group of college students being terrorized by a Siri-like AI system named Margaux.