Marc Malkin

Jean Baptiste Lacroix/WireImage.com

Ashton Kutcher is turning the upcoming comedy series he’s producing, Miss Guided, into a family affair.

I can exclusively report that his stepdaughter, Rumer Willis, recently shot a guest spot. “She plays a kind of a badass student,” Judy Greer, who stars in the ABC sitcom as a high school guidance counselor, told me earlier today.

“She was awesome. I love her,” Greer added, before cracking, “She’s a total badass, so it was perfect casting.”

Kutcher also pops up in the second episode, playing a substitute Spanish teacher who has the hots for Greer’s character. Yup, Greer locks lips with Mr. Kutcher: “The day we shot it, I was like, Oh my god! I’m going to kiss Ashton today—and he’s my boss!”

And what a boss he is.

ABC/RICHARD CARTWRIGHT

“When we were shooting the pilot, Ashton asked me what would be my dream if the show got picked up. I said my dream would be to buy my dad a Harley because he’s always wanted one,” Greer said. “Ashton was like, ‘If the show gets picked up, I’m going to give your dad a Harley.’ ”

Kutcher kept his promise.

“When it was delivered, my dad was totally in shock,” Greer said. “He cried and my mom cried and everyone was crying. But now I’ve written Ashton one too many thank-you notes, because he’s specifically told me to stop.”

Back to guest stars for a moment: Jamie Lynn Spears plays a boy-crazy high school senior in the second episode. If Spears was pregnant and knew it at the time of the October shoot, Greer said she kept it well hidden from cast and crew.

“She was just really lovely,” Greer said. “Her mom was there, and they were really cute together. It just felt like I was working with a really supersweet southern girl.”

That’s not all I have from Ms. Greer. I’ll have more for you closer to the Miss Guided premiere on Mar. 18.