Backyard Theatre is a documentary about playwright Michel Tremblay and director André Brassard’s flavourful brand of Quebec theatre, which captured the earthy wit and joual (slang) of Montreal's East End working-class neighbourhood. The film features impromptu improvisation by the cast of Les belles-soeurs and Demain matin, Montréal m'attend, two genre-defining plays.
| Actor | Role |
|---|---|
 Michel TremblayHimself | Himself |
 André BrassardHimself | Himself |
 Ève GagnierNot listed | Not listed |
 Amulette GarneauNot listed | Not listed |
 Mirielle LachanceNot listed | Not listed |
 Monique MercureNot listed | Not listed |
 Denise MorelleNot listed | Not listed |
 Denise FiliatraultNot listed | Not listed |
 Louise ForestierNot listed | Not listed |
 Claude GaiNot listed | Not listed |
| OOdette GagnonNot listed | Not listed |
| NNormand MorinNot listed | Not listed |
 André MontmorencyNot listed | Not listed |