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.
Happiness Runs
(Victor)
Sex Drive
(Randy)
The Lucky Ones
(Scott Cheaver)
Movie 43
(Calvin (uncredited))
We're the Millers
(Scottie P.)
Tammy
(Jesse)
The Curse of Downers Grove
(Ian)
Daddy's Home
(Dental Hygienist)
Swing State
(Neil Hornback)
Bad Art
(Benji)
Harry + Max
(Harry, Age 15)
Beneath
(Grubbs)
CSI: Miami
(Lucas Hall)
The Inbetweeners
(Neil Sutherland)
The Comeback
(Tyler)
Heroes
(Jeremy Greer)
Dexter
(Jeremy Downs)
Childrens Hospital
(Raye LePlante)
Ten Days in the Valley
(PJ)
Code Black
(Justin Keller)
Criminal Minds
(Owen Porter)
Filthy Rich
(Jason Conley)
Life in Pieces
(Scarecrow)
Veronica Mars
(Jimmy)
The O.C.
(Prepubescent Geek)
Still Standing
(Kid #1)