Robert Gribbroek was a layout artist and background painter at the Warner Bros. Cartoons from 1945 until 1964. He was first credited in Chuck Jones' Lost and Foundling (1944), and he worked mainly for Jones until 1950, in which he left the studio and was replaced by Maurice Noble. Following a three-year absence, Gribbroek re-emerged in 1953, initially installed within his previous position as Jones' layout man. Gribbroek was reallocated, however, to Robert McKimson's then-recently reopened unit in 1954, in which he would remain until the studio's closure in 1963.