
Acting
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, Worst Week, A Haunted House 2, Being Frank, and others. He also made guest appearances in popular shows like How I Met Your Mother and Happy Endings.…

A Love Like This
as Paul

Dear Santa
as Bill Turner

The Way Back
as Eric (uncredited)

The Binge

I'm Just F*cking with You
as Chester

Being Frank
as Stan

Super Troopers 2
as Mountie Podien

Director's Cut
as Reed

A Haunted House 2
as Ned

Someone Marry Barry
as Rafe

The Runarounds
as Finn Cooper · 8 ep.

History of the World: Part II
as Mark · 1 ep.

The Morning Show
as Marlon Tate · 1 ep.

Merry Happy Whatever
as Sean Quinn · 8 ep.

Mr. Mom
as Greg Anderson · 11 ep.

Single Parents
as Xander Fogerty · 1 ep.

Angie Tribeca
as Jay Geils · 30 ep.

Late Night with Seth Meyers
as Self - Guest · 1 ep.

Looking
as Barry Foster · 1 ep.

Friends with Better Lives
as Zac · 1 ep.
A Haunted House 2
2014