Matthew Garber
Updated: Wikipedia source
Matthew Adam Garber (25 March 1956 – 13 June 1977) was a British child actor, most notable as Michael Banks in the 1964 film Mary Poppins. His other screen credits include The Three Lives of Thomasina (1963) and The Gnome-Mobile (1967), appearing alongside actress Karen Dotrice in all three films they made for Walt Disney Pictures.