 1. Before his more notable acting roles, Dwayne The Rock Johnson guest-starred on That 70s Show as his father, Rocky Johnson, when Red and Eric attend a wrestling match. 2. Shortly before The Office began in 2005, Jenna Fischer appeared on That 70s Show as Stacy Wanamaker, whom Jackie sees as her idol because shes ... 35 Actors Who Actually Appeared On That 70s Show Some Before... 