David Livingston/Getty
October 17, 2016 12:15 PM

This Is Us star Justin Hartley has a hit new TV show on his hands, but it seems like he isn’t the only performer in the family. And for Hartley and his daughter Isabella Justice, her performances make for some sweet bonding time.

“Lately, she’s been doing this thing where she — it doesn’t matter what I’m doing, how busy I am, it doesn’t matter, sleeping, awake, it does not matter, if the game’s on,” Hartley told PEOPLE of his 12-year-old daughter at the Seventh Annual Veuve Cliquot Polo Classic in Pacific Palisades, California, on Saturday.

“She will come in and she will tell me that she has this really important dance — you know, rehearsal tomorrow, or audition or whatever for her school, and then she will proceed to do like four monologues, four songs, a dance, and the next thing you know it’s been like an hour,” adds Hartley, 39. “And that’s what we do now. I watch her perform.”

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With Isabella’s preteen years about to come to an end, the former soap star has prepared himself for the typical teen rebellion — but is hoping for a different outcome.

“I don’t know if this is going to be the one child in the history of the world that doesn’t have any problems, but I’m hoping that she is,” he shares, adding jokingly, “Maybe she’s an alien. I’m not sure.”

If her track record has anything to say about it, it seems like the This Is Us fans begging for upcoming plot secrets will be more of an effort to contain than his daughter.

“She’s perfect. She gets straight As. It’s like the most amazing thing that I don’t know where the hell she got it from, but she’s really good,” he says proudly.

And soon, Isabella will be changing her dancing and acting rehearsals to wedding rehearsals. Hartley is engaged to soap star Chrishell Stause, 35, and according to him, his daughter will be able to pick her role in the upcoming wedding.

“I think I’m going to have her do maybe the ring bearer and the flower girl, and maybe if she wants to she can sing,” he says. “She sings, as well. She can do whatever she wants.”

Hartley shares that the planning is “good,” but even though he and his fiancée are starting early, he wishes they had a bit longer and admits they might need some extra help.

“I think we’re going to do an intimate wedding,” he says. “We’re just starting now, and we’re realizing that even when you just start and you give yourselves tons of time to do it, you’re still behind. You’re always behind. You feel like you are. I might just hand it off to someone.”

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