Griffiths' movie roles were in: "Gorky Park" (1983), "Withnail and I" (1987), "King Ralph" (1991), "" (1991), "Guarding Tess" (1994) and "Sleepy Hollow" (1999). Later, he played Harry Potter's cruel uncle Vernon Dursley in the "Harry Potter movie series" ("Sorcerer's Stone", "Chamber of Secrets", "Prisoner of Azkaban", "Order of the Phoenix", and "Deathly Hallows Part 1".)