Monsters, Inc. (2001) cast and crew credits, including actors, actresses, directors, writers and more. Roz. Home › Movies ›‹ Monsters, Inc. › Roz. Roz VOICE Bob Peterson. Team Ups Voice Compare Voice Directors Franchises News Top Listings Coming Soon VA Quotes Casting Call Forums. Mike : Good morning, Roz, my succulent little garden snail. Bob Peterson is the voice of Roz in Monsters, Inc.. Movie: Monsters, Inc. Johanne Garneau. Franchise: Monsters, Inc. Incarnations View all 9 versions of Roz on BTVA. Monsters, Inc. (2001) Bob Peterson as Roz. And who will we be scaring today? Masako Isobe. Humberto Velez.