Why Harrison Ford is not in ‘Shrinking’ cast’s group chat

Harrison Ford has not entered their chat.

First-time Emmy nominee Jessica Williams said her “Shrinking” co-stars have a group text chain, but Ford, their fellow cast member, is not included in the conversation.

“Harrison’s definitely not on it. You could say it’s a group chat minus one,” she told The Post ahead of the Emmy Awards, airing on Jan. 15 on Fox, where she is nominated for Outstanding Supporting Actress in a Comedy Series.

“I just don’t think he texts. I don’t think he has to text. I don’t even know if he has a phone.”

In the Apple TV series, Williams, 34, plays a spunky therapist, and Ford, 81, her curmudgeonly mentor at a behavioral therapy center. Her character drives him to work — scenes the actress found daunting.

“I was really nervous,” she revealed. “It’s almost like when you don’t care about typing when you’re alone, but all of a sudden somebody’s over your shoulder … and you’re like, ‘Oh, how do I type?’ And then you mess up … and you’re like, ‘I promise I type better than this.’ So I get a little self-conscious driving in front of Harrison Ford for that reason.”

Williams said Ford, who is being honored with the Career Achievement Award at the Critics Choice Awards on Sunday, keeps the cast entertained on set.

“He’s a classic joke teller,” she said. “Like, you know people that will give you a setup, a punch line and tell you a story … It’s just such a cool kind of old-school thing to do.”

Born and bred in Los Angeles, Williams moved to the Big Apple at 22 to work on “The Daily Show” with Jon Stewart, and was the youngest correspondent the show ever hired.

She spent a decade in New York — and lived in Manhattan, and then Williamsburg, Prospect Heights and Clinton Hill, Brooklyn. Now she lives in Eagle Rock, CA, and misses her favorite restaurants, like Miss Ada in Fort Greene.

But she is fine with no longer taking the subway.

“Sometimes, when I have anxiety, it’s really hard for me to go underground in a tunnel where there’s starts and stops,” she said.

“Also if I was going to be on ‘The Daily Show’ or if I was acting, you actually don’t really want to take the subway because you can get stuck … Sometimes productions will be like, ‘Please, for the love of God, do not take the train to set because you literally might just be stuck underground.’”

At the Emmys, Williams, who is 6-feet tall, will be wearing a custom-made Rodarte dress, and she’s grateful for the fashion house’s willingness to fit her.

“I’m a size 14, which I think is the average size for a woman, and it’s actually really hard to get clothes in a size 14, especially from designers,” she lamented. “A lot of really great designers don’t want to lend to me … because I’m not a size four or six.”

Williams, who has her first table read for “Shrinking” Season 2 on Wednesday, is looking forward to more scenes with Ford — and hoping for some like the one where they got to belt out Sugar Ray’s song “Every Morning.”

“I get to do everything that I’ve ever wanted and then even more with Harrison’s character,” she said. “So I’m really excited, but definitely more car singing for sure.”