Welcome to our Walla Group! A Podcast for all things Film! Hosted by This Guy & That Guy, just two super considerate guys expressing their passion for movies and TV. In American radio, film, television, and video games, Walla is a sound effect imitating the murmur of a crowd in the background. A group of actors brought together in the post-production stage of film production to create this murmur is known as a Walla Group.