On Friday, 19-year-old Josephine "Josie" Bush will celebrate three years sober.
"It’s a hero’s journey," Bush told People magazine about his daughter. "I watch her and I’m blown away by the strength of character she has."
“Part of me was beating myself up, like, ‘How did I miss this?’” he admitted.
Bush, 46, said he gives credit to his daughter for committing to the process.
"We had someone to take care of and someone to help find her way," he continued. "Still, I cannot give credit to myself. It’s all Josie. She’s found an amazing sober community. I like watching them without drugs or alcohol, they do fun things together."
Bush, a former host for "Access Hollywood" and NBC's "Today," has three daughters with his estranged wife Sydney Davis: Josephine, Mary and Lillie.