Dax Shepard and Kristen Bell

The 'Frozen' star explained how she and Shepard started couples therapy in the early stages of the relationship to discover their argument patterns and how to stop them.

Kristen told People: "We have a very healthy marriage and we got there by doing therapy when we needed it, and constantly doing fierce moral inventories.

"We both take responsibility when we are wrong, and I think it is easy to work with him because I married him, because I enjoy spending time with him and I trust him."