'Suburgatory': Alicia Silverstone's Arrival 'Upsets a Few People,' Says Jeremy Sisto (Video)

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Clueless co-stars Alicia Silverstone and Jeremy Sisto reunite on Wednesday's Suburgatory, which sees single father George (Sisto) meeting Eden (Silverstone) at the Chatswin Farmer's Market -- and immediately becoming smitten with her and her healthy habits.

As Sisto told The Hollywood Reporter at Warner Bros. TV's Television: Out of the Box exhibit opening at the Paley Center, Silverstone's appearance "provides a big shift in the show and in George's storyline. He gets involved with her romantically and that kind of upsets a few people."

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"She moves in pretty quickly," he added, which he noted affects Dallas (Cheryl Hines) more than others.

When the idea for Silverstone to come onto the show was introduced, Sisto was all for it.

"When [creator] Emily [Kapnek] first brought up the idea, I was just excited to see Alicia and hang out with her again after so many years," Sisto said. "I've seen the pictures in the magazines and I went and did a little ADR so I've seen some of the scenes, it was exciting to see us together again."

As the first season wraps up, Sisto teased that the final four episodes are "a little different."

Suburgatory airs Wednesdays at 8:30 p.m. on ABC.