He died at his home in Point Reyes Station, Calif., as a result of complications from diabetes, according to his wife, Maria.
Peter Donat, a veteran actor of film, TV, and Broadway, has passed away at the age of 90, according to the The New York Times.
He was best known for his role in six episodes of TV's X-Files where he recurred as William Mulder, Agent Fox Mulder's father.
Fox Mulder actor David Duchovny enjoyed working with Donat, telling the New York Times "He had an easy gravitas as a performer and seemed to come from that generation that took the art seriously but not too seriously".
Born Pierre Collingwood Donat on January 20, 1928, in Kentville, Nova Scotia, Donat held Hawaii Five-O, Dallas, Murder, She Wrote, The Outer Limits, and Hill Street Blues among his list of guest-starring TV roles. On the big screen, he appeared in The Godfather Part II, War of the Roses, The Game, and Tucker: The Man and His Dream.
20, 1928, in Kentville, Nova Scotia, he made a decision to go into acting after being inspired by his uncle, British film star (and Oscar winner) Robert Donat.
He was, at one point, up for the role of Corleone family consigliere Tom Hagan in The Godfather, which, as we all know, went to Robert Duvall.
The actor is also known for recurring roles on 1980 series Flamingo Road, starring Morgan Fairchild; and on classic drama series Dallas, where he played the doctor who treated Larry Hagman's character in 1980 during the resolution of the classic cliffhanger, "Who shot J.R.?"
In addition to his wife, Donat is survived by his sons, Caleb, Christopher and Lucas; two stepdaughters, Barbara Park Shapiro and Marina Park Sutton; a stepson, Malcolm Park; 11 grandchildren; and his brother, Richard, who is also an actor.