<P> The voice acting of the series is relatively low - key , and the intention was to make most of the characters sound natural and conversational . Quintel wanted to make the show listenable and given contrast to most other cartoons , which often are difficult for adults to listen to . The main cast consists of voice acting veterans Mark Hamill , who portrays Skips and Roger Craig Smith , who plays Thomas . William Salyers plays the voice of Rigby , Janie Haddad portrays Margaret and Quintel 's former CalArts classmate Sam Marin voices Benson , Pops , and Muscle Man . Quintel portrays Mordecai and Hi - Five Ghost . Members of the production staff have voiced several characters throughout the series ; these include Minty Lewis , Toby Jones , Andress Salaff , and Matt Price . The Regular Show cast record their lines together in group as opposed to individual recording sessions for each actor ; this is to help the show 's dialogue sound natural . The series regularly uses guest voice actors for recurring characters ; these guests include Steven Blum , Courtenay Taylor , David Ogden Stiers , Robin Atkin Downes , Jeff Bennett , Jennifer Hale , David Kaye , Fred Tatasciore and Julian Holloway . </P>
<P> The voice acting of the series is relatively low - key , and the intention was to make most of the characters sound natural and conversational . Quintel wanted to make the show listenable and given contrast to most other cartoons , which often are difficult for adults to listen to . The main cast consists of voice acting veterans Mark Hamill , who portrays Skips and Roger Craig Smith , who plays Thomas . William Salyers plays the voice of Rigby , Janie Haddad portrays Margaret and Quintel 's former CalArts classmate Sam Marin voices Benson , Pops , and Muscle Man . Quintel portrays Mordecai and Hi - Five Ghost . Members of the production staff have voiced several characters throughout the series ; these include Minty Lewis , Toby Jones , Andress Salaff , and Matt Price . The Regular Show cast record their lines together in group as opposed to individual recording sessions for each actor ; this is to help the show 's dialogue sound natural . The series regularly uses guest voice actors for recurring characters ; these guests include Steven Blum , Courtenay Taylor , David Ogden Stiers , Robin Atkin Downes , Jeff Bennett , Jennifer Hale , David Kaye , Fred Tatasciore and Julian Holloway . </P>
who does mark hamill voice in regular show
who does mark hamill voice in regular show
Skips
Skips