Kristen Bellhad to go to extreme measures to make sure her kids didn’t spoilFrozen 2!

In aSirius XM interviewon Wednesday with costarIdina Menzel, Bell, who voices Anna in the Disney animated film, revealed that she decided to tell daughtersLincoln, 6, andDelta Bell, 4, spoilers for the film before realizing she was in breach of contract.

“I told my kids everything. I was in the mood to be a cool mom,” the actress, 39, recalled.

In order to try and help incentivize her kids tokeep the plot ofFrozen 2a secret, Bell added that she warned them “all of your teeth are gonna fall out” if they spilled the beans.

“That’s really good parenting,” Menzel, who voices Anna’ sister Elsa, quipped.

Bennett Raglin/Getty Images

Kristen Bell

Idina Menzel and Kristen Bell.Bennett Raglin/Getty Images

Idina Menzel , Kristen Bell and Jessica Shaw

Fortunately, her daughters didn’t seem to take the threat seriously.

“They kind of brushed it off,” Bell explained. “I think they were like, ‘Yeah, right.’ And then they saw the smile on my face and I was like, ‘no they are, they’re all going to fall out.’ ”

In early October, Bellspoke with PEOPLEabout how “excited” her two daughters are to see the new movie.

“They also already know the whole plot line and all the songs, and I have yet to make them sign an NDA, so I could be screwed because they’re pretty chatty,” she said, adding that she’s known the songs in the sequel for years now.

Idina Menzel and Kristen Bell

“I’ve been singing them the songs for a couple years now because we’ve been working on it for two and a half years,” she said.

“They are very excited even though they know everything that happens,” theVeronica Marsstar added. “They were not as intoFrozenone, they were only into Elsa and Anna because their friends were, but I think they’re going to be intoFrozen 2.”

Frozen 2opens in theaters Nov. 22.

source: people.com