Danica McKellar dishes on her new Christmas movie

The actress talks about her Hallmark movie “Christmas She Wrote,” her love of math and more.
4:54 | 12/04/20

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Transcript for Danica McKellar dishes on her new Christmas movie
scrooge movie? Ghosts of Christmas past? No, no, no. You see, I realize I made a bad call and I'm sorry. You're sorry the readers are upset. No. That's not -- look, I just flew 3,000 miles to see you. Could you consider my offer? Just for a minute? If palm trees pop up in pine berry. So that's a maybe? That's a no. Welcome back. That was a scene from hallmark's latest holiday movie "Christmas she wrote" starring actress mathematics writer who you know from "The wonder years," Danica Mckellar. Great to have you with us. Happy, early merry Christmas. Merry Christmas. Hallmark marking its 11th annual countdown to Christmas. We're getting 40 new movies from hallmark this season and yours is one of them, "Christmas she wrote." Tell us about it. I play Kaylee king and I write a column for a New York newspaper. A few weeks before Christmas my boss gets switched out to a new guy and he has to make budget cuts. Without reading my column, he fires me, cuts the column. I pick myself up. I take myself home and go home for the holidays. I hang out with my sister at her bakery. He then realizes he's made a big mistake and his boss says if you don't get her back, you're fired. He tried to call me. I don't answer his calls. He shows up and I've already moved on. I'm writing a column here. He spends the movie trying to get me back. In the meantime I'm hosting all these fun Christmas events. He goes to them. He is a bit of a scrbut maybe he starts to warm up and maybe we warm up to each other. It's a hallmark movie. It's super, super fun. It's on this Monday. Danica, do we even need to watch the movie now? You gave us everything. There are so many funny things in this movie. I think I'm a good cook. I'm a terrible cook. I make Christmas dinner. We go ice skating. I can't really ice skate. We used a photo do you believe. There's so much funny stuff. I'm really excited. I'll be live tweeting this Sunday night. It's goio be a fun Twitter party. I've made up my mind I'm going to answer every single person who tweets to me. #Christmasshewrote. If you tweet me 20 times, probably won't answer every one. I'm making it my mission. I like a good challenge. It's why I have a degree in mathematics. It's going to happen, this Sunday. You watch. Robach is over here -- we're trying to keep up with this. The live tweeting, the movie is happening, there's a scrooge in there, you get fired, you get rehired, there's a lot going on. There's romance too. I don't want to give anything away. I'm just sayin'. Too late, Danica. The movie is "Christmas she wrote." In real life it's mathematics she wrote. You have ten math books for kids age 0-16. You discovered this passion at the end of "Wonder years." How did it all come about? What do you hope the lasting impact will be? At the end of "The wonder years," like a lot of child stars I struggled with who I was. I wondered what my value would be if I didn't get recognized every day for this character I played. Right around that time I went to UCLA and got a degree in mathematics. I just loved a good challenge. What I found is that it gave me a new sense of value and identity totally separate from acting which was incredibly helpful to me. I combined two loves, my love of math and entertainment by writing entertaining math books. That really didn't exist as far as I could tell. The latest one is called "The time machine." I've got books for ages 0-16. It's all at mckellarmath.com. This is the newest one. It's like for third and fourth grade. It teams times and division. It's teaching things with cartoons, silly jokes and stories and poems to make the I know who is going to be on Twitter this weekend, Danica. Thank you so much for joining us. "Christmas she wrote" premieres this Sunday 8:00 P.M. On the Hallmark Channel. Have a wonderful holiday. You too. She was fantastic. I don't think I've ever had a guest get that much in in the time that we had. I want what she's having. She got it all in. If that's caffeine induced, I'm all for it. Final thoughts today.

This transcript has been automatically generated and may not be 100% accurate.

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