Details as to their roles are under wraps.
Each competitor must keep walking faster than three miles per hour or risk being eliminated.
Production is underway and will continue in locations throughout the province of Manitoba through the summer.
Judy Greer and Mark HamillStephanie Diani/Getty Images
Other recent projects include HBOs limited seriesWhite House Plumbers,Guardians of the Galaxy Vol.
3, and Hulus comedy seriesRebootfrom Steve Levitan.
Greer is represented by CAA, Artists First, and Felker Toczek Suddleson.
Hamill is repped by Gersh and Kleinberg Lange Cuddy & Carlo.
