The Gnome-Mobile is a 1967 Disney musical film, directed by Robert Stevenson. It was one of the last films personally produced by Walt Disney. It was based on a 1936 book by Upton Sinclair entitled The Gnomobile. Walter Brennan gives a double performance as D.J. Mulrooney, the kind-hearted lumber tycoon of Irish descent; and as the irascible 943 year-old gnome Knobby. The children, Elizabeth and Rodney, were played by Karen Dotrice and Matthew Garber, familiar from their roles as Jane and Michael Banks in Mary Poppins. Tom Lowell who plays the young gnome Jasper in this movie, also appeared in the 1965 Disney film That Darn Cat! as Canoe, the befuddled surfer boy-friend of Hayley Mills. The Gnome-Mobile was Matthew Garber and Ed Wynn's last movie as Garber died ten years later and Wynn die