Life and Career Edit
Knudsen was born in Toronto, Ontario. In 1999 Knudsen got his first acting role as Alex Schreffler in the TV series Real Kids, Real Adventures. In 2001, Knudsen guest starred on The Guardian and appeared in three other episodes. He was nominated for a Young Artist Award for his performance. In 2003, Knudsen starred in the TV series Mental Block.
He co-starred as Leroy "Lefty" in the film adaptation of Youth in Revolt, and in Scott Pilgrim vs. the World as Lucas "Crash" Wilson, who was the lead singer of fictional band Crash and the Boys. In 2005, he starred in the horror film Saw II.
Knudsen portrayed Robbie in the 2011 film Scream 4.
Knudsen plays Ryan in the film The Barrens, co-starring True Blood's Stephen Moyer, which was released in late 2012.
He played teen tech genius Alec Sadler in the Canadian Science Fiction series Continuum, along with Rachel Nichols and Victor Webster and was nominated for Best Supporting Actor for two consecutive years at the Saturn Awards.
He will be seen in Bon Cop, Bad Cop 2, horror feature Darker Than Night and upcoming Spike TV series based on the Stephen King novel, The Mist.
|2000||Tribulation||Young Tom Canboro|
|2000||Common Ground||Young Johnny Burroughs||Television movie|
|2000||Santa Who?||Nasty Boy||Television movie|
|2001||Blackout||Ian Robbins||Television movie|
|2001||The Familiar Stranger||Young Chris Welsh||Television movie|
|2001||Stolen Miracle||Tommy||Television movie|
|2003||Full-Court Miracle||TJ Murphy||Television movie|
|2005||The Prize Winner of Defiance, Ohio||Rog Ryan at thirteen years old|
|2005||Saw II||Daniel Matthews|
|2006||Booky Makes Her Mark||Arthur Thomson||Television movie|
|2006||Bon Cop, Bad Cop||Jonathan Ward|
|2006||A Lobster Tale||Timmy Brock|
|2008||A Teacher's Crime||Jeremy Rander||Television movie|
|2008||Saw V||Daniel Matthews||Uncredited|
|2009||Youth in Revolt||Leroy "Lefty"|
|2010||Saw 3D||Daniel Matthews||Uncredited|
|2010||Scott Pilgrim vs. the World||Luke "Crash" Wilson|
|2011||Scream 4||Robbie Mercer|
|2017||Bon Cop, Bad Cop 2|
|1999||Real Kids, Real Adventures||Alex Schreffler||Episode: "Heimlich Hero: The Michelle Shreffler Story"|
|2000||In a Heartbeat||Jason||Episode: "You Say It's Your Birthday"|
|2001–02||The Guardian||Hunter Reed||4 episodes|
|2003–04||Mental Block||Donovan Mackay||26 episodes|
|2004||Blue Murder||Jake Green||Episode: "Janet Green"|
|2005||Kevin Hill||Ryan Stallinger||Episode: "Losing Isn't Everything"|
|2006–08||Jericho||Dale Turner||18 episodes|
|2008||Flashpoint||Jackson Barcliffe||Episode: "The Element of Surprise"|
|2012||Saving Hope||Mitchell||Episode: "Pilot"|
|2012–15||Continuum||Alec Sadler||41 episodes|
Nominated—Saturn Award for Best Supporting Actor on Television (2014–16)
|2012||Degrassi||Darrin Howe||2 episodes|
|2016||12 Monkeys||Thomas Crawford Jr.||Episode: "One Hundred Years"|