Kristen Bell is happy not to be a "big fish".

She said: "Those big fish sometimes have a real hard time. They can't... I can still go to the grocery store. So I think I'm really happy with the size fish that I am."

Despite her years of success, the 36-year-old star - who has daughters Lincoln, three, and Delta, 18 months, with husband Dax Shepard - insists she doesn't "deserve" it as a lot of her achievements are down to being in the "right place at the right time".

She told CBS' 'Sunday Morning': "I don't deserve to be here. I worked hard, but I was also in the right place at the right time. And I'm really, really grateful for the jobs that I've had."

And Kristen admitted she often feels "stupid" because she spends a lot of time with "intellectuals".

She said: "I feel stupid sometimes. That's a truthful insecurity. I am around so many talented artists and intellectuals and creative people. I spend a lot of time with people that are smarter than me. So one of my truthful insecurities is that I feel stupid a lot."

Elsewhere during the interview, the 'Frozen' star showed off her wedding pictures for the first time, revealing she wore black trousers for the simple ceremony in 2013.

She said of her big day: "We got married in a tiny room in the Beverly Hills courthouse, and it was still one of the best days of my life."

And Kristen grew emotional as she discussed how much of a great father her 41-year-old spouse - who battled drug addiction until getting clean in 2004 - is to their kids.

She said: "He's a wonderful father.

"He knows the value of things. He was an addict for many, many years and he pulled himself out of it, and he's been sober for 11, 12 years now. ... And he knows how many times he's messed up and how many times he's been really closing to losing everything."