Frankie Muniz says the “Malcolm in the Middle” reboot may not be what fans are expecting.

During a recent appearance on the “Lightweights” podcast, Muniz said long-time fans may be “surprised” after they see what the Wilkerson family has been up to during their 20-year absence.

“I think people will be surprised, in a sense, where everybody is and the story,” Muniz said. “It’s hard to fit in 20 years of stuff into four 30-minute episodes, right? But I think people are going to be very happy with what they came up with.”

Muniz beamed when discussing his return to the early-aughts family sitcom, describing his experience shooting the reboot as “the best time of my entire life.”

“I’m not exaggerating when I say filming this reboot, like I loved it so much, way more than I ever thought I could have,” he said. “We ended in May, and I haven’t talked to anybody since, you know what I mean? I’ve been gone. I’ve only been home, I think, for 12 days since the beginning of the year. I’m just always crazy, and I think next week, I’m going to have time. I’m going to reach out [to the rest of the cast].”

The original “Malcolm in the Middle” ran for 151 episodes across seven seasons from 2000 to 2006. The four-part reboot sees Muniz reunited with original cast members Bryan Cranston, Jane Kaczmarek, Christopher Masterson and Justin Berfield.

Erik Per Sullivan, who played the youngest Wilkerson child, Dewy, did not return for the new episodes. The role was instead played by Caleb Ellsworth-Clark. Other new cast members include Kiana Madeira, Anthony Timpano, Vaughan Murrae and Keeley Karsten.

In an interview with People, Cranston said he “missed” playing Hal Wilkerson and loved returning to the world of “Malcolm in the Middle.”

“It’s been almost 20 years since we said goodbye,” he said. “And he’s a sweet, lovable man. He’s a lovable guy, and it was fun to see my whole family back together. It was great.”

The official logline for the reboot reads, “Malcolm and his daughter are drawn into the family’s chaos when Hal and Lois demand his presence for their 40th wedding anniversary party.”