MacArthur completed his high school studies at Deerfield Academy. After this, he joined Bowdoin College to pursue a Bachelor’s in Government. To pursue his interest in acting, he later enrolled in Groundlings Theater Company and Atlantic Theater Company, too.
He made his feature film debut with Homo Erectus, portraying Thudnik. However, he is most widely known for playing Jay Geils in Angie Tribeca. His other acting credits also include Go On, W...
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Prep & Landing
As Thrasher (voice)
Lower Learning
As Digdug O'Shaughnessy
The Game Plan
As Kyle Cooper
Dear Santa
As Bill Turner
Homo Erectus
As Thudnik
Life As We Know It
As Peter Novak
Look
As Tony Gilbert
The Motel Life
As Officer Cook
Bachelorette
As Dale Beaumont
Someone Marry Barry
As Rafe
A Love Like This
As Paul
Director's Cut
As Reed
Jewtopia
As Chuck O'Connell
The Babymakers
As Leslie Jenkins
Prep & Landing: Totally Tinsel Collection
As Thrasher
Super Troopers 2
As Mountie Podien
Being Frank
As Stan
Are We Done Yet?
As Jimmy the Bartender
She's Out of My League
As Ron
Prep & Landing: Naughty vs. Nice
As Thrasher (voice)
I'm Just F*cking with You
As Chester
The Binge
The Way Back
As Eric (uncredited)
A Haunted House 2
As Ned
How I Met Your Mother
As Curt
Medium
As Randy Pilgrim
Perfect Couples
As Rex
Whitney
As Lance
Looking
As Barry Foster
Really
As Charlie
Angie Tribeca
As Jay Geils
Curb Your Enthusiasm
As Doorman
The Rebels
As Rick Massella
The Morning Show
As Marlon Tate
Pushing Daisies
As Buddy Amicus
Mr. Mom
As Greg Anderson
Single Parents
As Xander Fogerty
Merry Happy Whatever
As Sean Quinn
The King of Queens
As Ed
Friends with Better Lives
As Zac
Happy Endings
As Steven
History of the World: Part II
As Mark
Go On
As Wyatt
Suburgatory
As Walter