Kristen Bell says Dax Shepard is "doing really great" after his relapse.

Dax Shepard and Kristen Bell

Dax Shepard and Kristen Bell

The 'CHiPS' actor recently admitted he relapsed into taking Vicodin again after several years sober after his recent motorcycle accident but Kristen admitted she is really proud of her husband.

She said: "He is actually doing really great ... Everybody is up against their own demons. Sometimes it's anxiety and depression. Sometimes it's substance abuse. The thing I love most about Dax is ... that he was able to tell me and tell us and say, 'We need a different plan.' We have a plan: if he has to take medication for any reason, I have to administer it. But he was like, 'We need a stronger plan. I was faltering.' I have to do some sort of emotional work to figure out why I wanted to use again."

Kristen insists the only thing that Dax is "addicted" to is "evolving".

Speaking on The Ellen DeGeneres Show, she added: "He's addicted to evolving.

"He was like, 'I don't want to risk this family and I did, so let's put new things in place to make sure it doesn't happen again.' I will continue to stand by him because he's very, very worth it."

Last month, Dax confirmed he had suffered a relapse last week.

He said: "I have a tremendous amount of fear about doing this. Maybe some people will feel a sense of betrayal because we preach honesty and I was being dishonest ... Eight years into sobriety, I had not done a single shady thing. In 2012, my father was dying. He got diagnosed with cancer in August and then he died December 31. I was going back [and forth] nonstop to do all the treatments with him and take him to chemo ... I also got into a motorcycle accident going to work on 'Parenthood' at the time. I immediately called my sponsor, and I said, 'I'm in a ton of pain and I gotta work all day. And we have friends that have Vicodin.'"