Ashton Kutcher Says It Felt 'Pretty Bizarre' Filming the Upcoming That '70s Show Spin-Off

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Ashton Kutcher's recent trip down memory lane was surreal to say the least.

The actor and entrepreneur opened up about his experience returning to film Netflix's upcoming That '70s Show spin-off, That '90s Show.

"It was really nostalgic to be back on the set," Kutcher, who played Michael Kelso on the OG series, told Variety. "It's all the same folks that made That '70s Show, so it was pretty bizarre."

Kutcher, 44, starred on That '70s Show alongside real-life wife Mila Kunis, Topher Grace, Laura Prepon, Wilmer Valderrama, Danny Masterson, Debra Jo Rupp, Kurtwood Smith, Tanya Roberts, Don Stark, Lisa Robin Kelly and Tommy Chong. The Fox sitcom, which aired for eight seasons from 1998 to 2006, followed a group of teens' many adventures and mishaps in 1970s Wisconsin.

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Glenn Howerton later starred in the short-lived That '80s Show not long after its predecessor's series finale. And last October, Netflix announced its plans to develop a sequel series titled That '90s Show centered on Eric Forman (Grace) and Donna Pinciotti's (Prepon) daughter Leia (Callie Haverda) as she visits her grandparents Kitty (Rupp) and Red Forman (Smith) for the summer.

RELATED: Topher Grace Says 'It's Hard' to Watch That '70s Show Reruns, Talks 'Top Secret' That '90s Show

The streamer confirmed in April that Kutcher, Kunis, Grace, Prepon and Valderrama are set to make special guest appearances on the new series. Before agreeing to return, Kutcher and Kunis, 38, discussed whether it would even be a good idea.

"Mila and I were contemplating it. We thought, 'Listen, we're only in the position that we're in because of that show, so let's just go back and do this. We just went back and had fun for a week. It was so random and fun,'" he also told Variety, adding that it's "really funny" and that the "new cast is phenomenal."

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Teasing what else is to come, Kutcher additionally told Entertainment Tonight: "We shot it. It's funny and it's weird."

"It was super nostalgic and really odd. Going back into the basement — just going back into the set was weird," he added. "And then being around everyone, it's just bizarre."

Ashley Aufderheide, Mace Coronel, Maxwell Acee Donovan, Reyn Doi and Sam Morelos also star in the upcoming iteration, which does not yet have a release date.