He played Bastian Bux in the TV series, Tales from the Neverending Story, and the title character in The Interrogation of Michael Crowe.
Fortunately, around the same time, the Cameron Maclntosh London touring production of the musical "Oliver" was holding auditions for children.
He later starred in several films, including The Impossible Elephant, Tales from the Neverending Story (for which he received a 2002 Gemini nomination), the multi-award-winning Touching Wild Horses (2002) opposite Jane Seymour (for which he received a 2003 Young Artists Award nomination), Disney's The Scream Team with Eric Idle, the Court TV Peabody Award-winning true story, The Interrogation of Michael Crowe (for which he received a 2004 ACTRA Award nomination for Outstanding Performance - Male), Don McKellar's dark comedy Childstar (2004), opposite Jennifer Jason Leigh, Eric Stoltz and Dave Foley; the title role in Spirit Bear: The Simon Jackson Story (2004) with Ed Begley, Jr. and Graham Greene, NBC's mini-series Revelations (2005) opposite Bill Pullman and Natascha MacElhone, and Francois Girard's Silk.
Rendall played supporting roles in the films 30 Days of Night, opposite Josh Hartnett and Melissa George, and Charlie Bartlett, with Anton Yelchin and Kat Dennings.
In August 2021, Rendall and Elliot Page released three home recorded, low-fidelity tracks and gave them away on Bandcamp.