Kristen Bell and Dax Shepard "argue about absolutely everything"

Kristen - who has daughters Lincoln, 11, and Delta, nine, with the comedian - told E! News: "I married my polar opposite.

"We are the antithesis of each other. We argue about absolutely everything, but there is a foundational trust that we've built that keeps us together and is quite stimulated by one another's opinions."

She added: "Being with someone who you are unlike, or you don't have a ton of similarities with, it forces you to grow."

Dax recently shared how the pair are determined to set a good example for their children.

The celebrity duo is keen to ensure their girls eat healthily and learn from the example of their parents.

Dax - who has a degree in anthropology - told E! News in June: "Anthropologically speaking, we crave sugar because it was so scarce throughout history and because nothing that's ever been poisonous has tasted really sweet.

"But the reality is, it doesn't make us feel good. So we talk about a lot about the outcome."

Despite this, Kristen and Dax don't want to put too much pressure on their children.

The actress explained: "Allowing my kids to see that it's something adults struggle with, and that we have to fight the need for wanting ice cream all the time, it makes them feel like we're all on the same team."