The star passed away at a home for retired actors in London on Tuesday (02Aug11), just hours after his birthday (01Aug11).
Pearson made his film debut at the age of 32 in the 1950 movie The Girl is Mine, and went on to appear in three Roman Polanski movies, Macbeth, Tess, and Pirates.
The actor was best known in his native Britain for voicing Mole in 1983 TV movie The Wind in the Willows and its subsequent small screen series of the same name.
His last film appearance came in 2002, when he starred in Men In Black II, alongside Will Smith.
Pearson's son Patrick says, "He did a rather good line in rather priggish, pompous characters."