William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
Beverly Hills 90210 - Season 5
NCIS - Season 16
Heroes - Season 1
Third Watch - Season 6
Beverly Hills 90210 - Season 4
Bosch - Season 5
Its Always Sunny in Philadelphia - Season 14
ER - Season 5
American Dreams - Season 2
The OC - Season 3
Scandal - Season 6
California Dreams - Season 2
The West Wing - Season 6
Its Always Sunny in Philadelphia - Season 12
Studio 60 on the Sunset Strip - Season 1
Bosch - Season 7
Bosch - Season 2
Its Always Sunny in Philadelphia - Season 16
Pitch - Season 1
Double Tap (1997)
The Division - Season 4
Its Always Sunny in Philadelphia - Season 11
California Dreams - Season 4
Third Watch - Season 2
NCIS - Season 1
The West Wing - Season 7