Photo: Patrick Wymore/Netflix

Kurtwood Smith, Debra Jo Rupp

Debra Jo RuppandKurtwood Smithcould not be more proud of their formerThat ’70s Showcostars.

During the premiere of Netflix’sThat ’70s Showspinoff,That ’90s Show,Rupp and Smith — who will reprise their roles as Kitty and Red Forman in the upcoming series — couldn’t help but marvel at how successfulAshton Kutcher,Mila Kunis,Laura PreponWilmer Valdarrama, andTopher Gracehave turned out to be.

“They’re unbelievable human beings,” Rupp, 71, told PEOPLE at the event last Thursday. “They really are.”

“They’ve all done so well,” Smith, 79, chimed in. “The quality of the work that they have done is so good. It’s not just that they’ve been successful. They do good work.”

“And so I think we feel especially proud of that because we were with them when they were just starting out, so we like to think we have a little influence on them,” he added.

FOX/Getty

THAT ‘70S SHOW - Top row L-R: Wilmer Valderrama, Ashton Kutcher, Danny Masterson, Topher Grace, Laura Prepon. Center L-R: Don Stark, Tanya Roberts, Mila Kunis, Lisa Robin Kelly, Debra Jo Rupp, Kurtwood Smith. (Photo by FOX Image Collection via Getty Images)

In December, the networkdropped a new trailer for the series, featuring Kitty and Red’s teenage granddaughter, Leia (Callie Haverda), who comes to visit Wisconsin during the summer of 1995, and finds a group of misfits who welcome her with open arms.

The trailer also featured a glimpse at series OGs Kutcher, Kunis, Valdarrama, Grace, Prepon andTommy Chongreturning to Point Place home as a whole new generation stepped into the very same basement for their coming of age.

“Seeing all the kids come back, it was almost like no time passed,” she said. “It was like a mini reunion every week. It’s just been amazing.”

Rupp echoed those sentiments while speaking to PEOPLE about returning to Point Place at Thursday’s premiere. “It’s kind of great,” she said. “This is familiar… [but] it’s different. It’s 10 episodes as opposed to 20-something.”

“And the fact that it’s a summer, it fits with a shorter time period,” she added. “It’s kind of perfect.”

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That ’90s Showwill premiere Thursday on Netflix.

source: people.com