Born and raised in Sioux City (Iowa, USA) Ron traces his interest in animation to his first viewing of Pinocchio at age 9. Born in Chicago (USA), John knew by age 8 that he wanted to become an animator. After their studies, they came to California to try their luck at animation. They joined their creative forces in 1983 to write The Great Mouse Detective and co-directed it with Burny Mattinson and Dave Michener. They worked together on other projects, including The Little Mermaid in 1989, Aladdin in 1992 or Hercules in 1997.
1986 BASIL, THE GREAT MOUSE DETECTIVE (Basil, détective privé)
1989 THE LITTLE MERMAID (La Petite Sirène)
1997 HERCULES (Hercule)
2002 TREASURE PLANET (La Planète au trésor, un nouvel univers)
2009 THE PRINCESS AND THE FROG (La Princesse et la grenouille)
2016 MOANA (Vaiana, la légende du bout du monde)