In one of her last interviews, Tanya Roberts, who played Donna's mother in the original series, stated that she would be willing to appear if the series got a revival and she was asked. Sadly, Roberts passed away in January 2021, eight months before the revival was announced.
Ashton Kutcher later stated that he originally turned down the cameo offer in the first episode, but then his wife and fellow original series alumnus Mila Kunis highly encouraged him, saying "Y'know we owe our entire careers to this show, it doesn't matter what the script is, we're doing it" and they both did their cameos.
Original series regulars: Topher Grace, Laura Prepon, Mila Kunis, Ashton Kutcher, and Wilmer Valderrama all made appearances, reprising their roles from That '70s Show (1998).
Parts of the furniture in the basement used to be in That 70s show's living room.
That '70s Show (1998)'s co-creator Terry Turner actually cried on set during an episode taping, feeling very emotional to be returning after many years.