"Can I say, though, that cat toy ... that is a fur-covered dildo, no?" Kendrick asked Letterman. "There was a factory. They were putting those out. They said, 'Put a mitten on it and sell it to children.' It's for kids now."
A puzzled Letterman then said he's been "desperate to think other things it might be when in fact that's all it actually is" and offered Kendrick the furry toy as a Christmas present.
Later on, Kendrick, who got to the interview fresh off a flight from London, revealed how she manages to get through really long flights.
"I've got that London flight down to a science because of Ambien," she told Letterman.
Ambien is a sedative that is often prescribed to treat short-term insomnia.
"It's a hell of a drug. I just sort of just blackout when I take it and I wake up to a surprise every time. Like all my DVDs are in my fridge or something," she joked. "It's like a time travel and a little surprise."
Kendrick will next star as Cinderella in Into The Woods, out in theaters on Christmas Day.