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Jon Provost
Known for: ActingJonathan Bion Provost is an American actor, best known for his role as young Timmy Martin in the CBS series Lassie. Wikipedia
Filmography 11
The New Lassie
as Steve McCullough 
The Computer Wore Tennis Shoes
as Bradley 
This Property Is Condemned
as Tom 
All Mine to Give
as Robbie Eunson - age 6 
Back from Eternity
as Tommy Malone 
Lassie: Disappearance
as Timmy Martin 
Lassie's Great Adventure
as Timmy Martin 
Colonials
as Spark (voice) 
The Story of Lassie
as Self 
Lassie: The Wayfarers
as Timmy Martin