John Wildman's acting career began to take shape in 1970 with his lead role in the title character of the National Film Board of Canada (NFB) award-winning short film "The Huntsman", which premiered at the Cork Film Festival. This was followed by appearances in "The Christmas Messenger" alongside Richard Chamberlain and "The Newcomers" with Kenneth Welsh.
After completing his education at the Dawson College Theatre Program in Montreal, Wildman landed starring roles in several films, including "Humongous", "Les Annees Des Reves" with Monique Mercure and Gilbert Sicotte, "Exit" with Michel Cote and Louise Marleau. His portrayal of the title character in the multiple award-winning "My American Cousin" earned him a Genie award for Best Actor, and he reprised his role in the sequel "American Boyfriends".
Wildman's television career saw him star in the CTV series "The Campbells" as Neill Campbell for four seasons, as well as appearances in "Les Tisserand Du Povoir" with Gabrielle Lazare, "Prince For A Day" with Richard Belzer, "The Adventures of Smoke Bellew", "Family Passions" as series regular Dillon MacDeere alongside Laurie Holden, "Kung Fu The Legend Continues" with David Carridine, and "The Way Of The West" with Jessica Pare.
In addition to his starring roles, Wildman has made numerous guest appearances on various TV shows, including "The Murdoch Mysteries", "Heartland", "La Femme Nikita", "Blauvogel", "Secret Service", "Catwalk", "Bordertown", "T and T", "The Littlest Hobo" with Carling Bassett, CBC's teleplay of "Balconville" with Peter MacNeill and Jayne Eastwood, and the episode "By Reason Of Insanity" of "For The Record", directed by Don Shebib.