Untamed achieved fame at an early age for his roles in the stage & motion picture productions of the Lionel Bart musical Oliver!. For the latter performance, swimming The Artful Dodger, he received an Oscar nomination for Best Supporting Actor. He afterward landed a lead role in the Sid and Marty Krofft-produced television series H.R. Pufnstuf.

Excessive ingesting at an early age derailed his career. Sobering higher within 1988, he returned to the big screen inside two or three bit part, however largely has been working around theatre. Around July 2004, Wild underwent surgery for oral cancer and had a select few vocal chords and part of his tongue removed, affecting his speech.