Born Markell V. Efimoff in Everett, Washington, Young began acting at the age of 9 and moved to Los Angeles when he was 12 to pursue his career. His first significant on-screen credit was a small role in two episodes of the HBO series Six Feet Under.
Young's other notable appearances include television shows The OC, Dexter, Big Love, Childrens Hospital, Heroes, Secret Life of the American Teenager, Cold Case, ER, CSI: Crime Scene Investigation and The Inbetweeners, while his film credits include Sex Drive, Happiness Runs, a turn as Tim Robbins' character's son in The Lucky Ones, and We're the Millers, a comedy starring Jennifer Aniston, Emma Roberts, Will Poulter, Jason Sudeikis, Ed Helms, and Nick Offerman.
2020
as Jason Conley
2019
as Benji
2017
as PJ
2017
as Neil Hornback
2015
as Dental Hygienist
2015
as Justin Keller
2015
as Scarecrow
2015
as Ian
2014
as Jesse
2013
as Grubbs
2013
as Scottie P.
2013
as Calvin (segment "The Thread")
2012
as Neil Sutherland
2010
as Victor
2008
as Raye LePlante
2008
as Randy
2008
as Scott Cheaver
2006
as Jeremy Downs
2006
as Jeremy Greer
2005
as Owen Porter
2005
as Tyler
2004
as Jimmy
2004
as Harry, Age 15
2003
as Prepubescent Geek
2002
as Kid #1
2002
as Lucas Hall