In 2006, Moore guest-starred as Christine St. George, a high-strung host of a fictional TV show, in three episodes of the Fox sitcom "That '70s Show". Moore's scenes were shot on the same soundstage where "The Mary Tyler Moore Show" was filmed in the 1970s. Moore made a guest appearance on the season two premiere of "Hot in Cleveland", which starred her former co-star Betty White. This marked the first time that White and Moore had worked together since "The Mary Tyler Moore Show" ended in 1977. In the fall of 2013, Moore reprised her role on "Hot in Cleveland" in a season four episode which not only reunited Moore and White, but also former MTM cast members Cloris Leachman, Valerie Harper and Georgia Engel as well. This reunion coincided with Harper's public announcement that she had been diagnosed with terminal brain cancer and was given only a few months to live.