David Bradley
David Bradley (born 17 April 1942) is an English actor. He is most widely known for portraying Argus Filch in the Harry Potter film series, Walder Frey in the HBO fantasy series Game of Thrones, and Abraham Setrakian in the FX horror series The Strain. He was awarded a Olivier Award in 1991 for his supporting role in King Lear at the Royal National Theatre.
Known for
Frankenstein 
Harry Potter and the Sorcerer's Stone 
The World's End 
Chicken Run: Dawn of the Nugget 
After Life 
Guillermo del Toro's Pinocchio 
Harry Brown 
The Strain 
Jolt 
Good Grief 
Exorcist: The Beginning 
Another Year 
Await Further Instructions 
Twice Upon a Time 
The Lodgers 
Your Christmas or Mine? 
Blow Dry 
World Without End 
Catherine Called Birdy 
An Adventure in Space and Time 
Wizards 
Your Christmas or Mine 2 
The Young Messiah 
Allelujah 
Guillermo del Toro's Pinocchio: Handcarved Cinema 
The Intended 
When Harry Left Hogwarts