For Patton Oswalt, "My Little Pony" is a family affair.

His 10-year-old daughter, Alice, grew up playing with the colorful Hasbro toys and watching Discovery Family's animated series, "My Little Pony: Friendship is Magic," now in its ninth season. So naturally, she was champing at the bit when the opportunity came up to voice a character in an upcoming episode, along with Oswalt and his new wife, actress Meredith Salenger.

"It was really neat to see that our daughter has some real skills, as far as voiceover is concerned," Oswalt says. "They wrote such a funny but also very beautiful episode for us to do together. It just felt great."

Oswalt returns to the show as neurotic horse Quibble Pants, who first appeared in 2016. In Saturday's episode (11:30 am EDT/PDT), his character struggles to impress Wind Sprint (Alice Oswalt), the sports-loving young daughter of his new "special pony," Clear Sky (Salenger). The episode reaches an emotional conclusion when Wind learns to accept Quibble, after Clear reminds Wind that he's not trying to replace her now-absent dad, but just wants her to like him.

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The storyline hit close to home for Oswalt. His first wife (and Alice's mom), true-crime writer Michelle McNamara, died suddenly in her sleep in 2016 at age 46, from a combination of prescription medications and an undiagnosed heart condition. He remarried in late 2017, and says that Salenger and his daughter have formed their own special relationship, even as the family has grieved.

"They both took it at their own pace," Oswalt says. "Neither of them tried to rush anything, which was really amazing to see two people work it out in such a mature way. They both have such strong personalities, and were able to be really open and communicate in their own way.

"There were certainly aspects of that (experience) that came up in the making of the episode that we could hark back to, like, 'Oh, remember that,' " he adds. "It was really interesting to see."

Oswalt says Alice has since outgrown "My Little Pony," and is currently obsessed with "Harry Potter" and "Spider-Man." (She still doesn't share his love of "Star Wars," much to his chagrin.) And although the stand-up comic displayed his knowledge of all things "Pony" in a 2016 appearance on "Conan," he insists he is not a card-carrying "Brony," a term of endearment for the franchise's adultsuper-fans.

"I still don't know enough about the world to confidently say that I'm a Brony," Oswalt jokes. "I certainly do know a lot, but I would not go as far as saying that I have that kind of rarefied knowledge."