Cord Jefferson Director, Screenwriter, Producer Jeffrey Wright Thelonious "Monk" Ellison Actor Tracee Ellis Ross Lisa Actor John Ortiz Arthur Actor Erika Alexander Coraline Actor Leslie Uggams Agnes Actor Adam Brody Wiley Actor Issa Rae Sintara Actor Sterling K. Brown Cliff Actor Elle Sciore Layne Actor Miriam Shor Paula Actor Myra Lucretia Taylor Lorraine Actor Keith David Willy the Wonker Actor Ben LeClair Producer Nikos Karamigios Producer Jermaine Johnson Producer Rian Johnson Executive Producer Ram Bergman Executive Producer Percival Everett Executive Producer Michael Bowes Executive Producer Cristina Dunlap Cinematographer Jonathan Guggenheim Production Design Maddy Young Art Director Kyra Friedman Curcio Set Decoration Rudy Mance Costume Design Jennifer Euston Casting