John Cena Thanks BTS Army, K-Pop Band For Helping Him During Dark Period In His Life

John Cena got candid about the impact BTS and their fans, the Army, had on him, crediting them for his journey toward self-love.

During a virtual appearance on "The Ellen DeGeneres Show" Monday, Cena spoke about how fans of BTS supported him during his lowest moments and helped him embrace vulnerability years ago.

The 43-year-old actor and wrestler said the K-pop group and their fans helped inspire him to write his two new self-help books, "Be a Work in Progress: And Other Things I'd Like to Tell My Younger Self" and "Do Your Best Every Day to Do Your Best Every Day: Encouraging Words from John Cena," both of which hit shelves Tuesday.

"I was going through a pretty down period in my life, it was about four years ago, and I decided just to have a vulnerable moment and put one of those thought-provoking journal entries out on Twitter," Cena was quoted by Entertainment Tonight as telling DeGeneres.

BTS had released their 2018 album, "Love Yourself," at the time so Cena's post caught the attention of the South Korean boy band's huge fanbase.

"The very popular group, BTS, had just released an album called, Love Yourself. So I put out all these messages about self-love and I'm thinking, 'This is not going to be a good idea because this big, larger-than life, 16-time WWE champion is now talking about vulnerability and the fact that you are enough and you shouldn't be ashamed of who you are,' but it caught fire because of the BTS Army," he continued.

Looking back, Cena acknowledged that BTS' fans helped him turn his moment of vulnerability into a new passion that resulted in his motivational books. His books aim to help one reflect and hopefully become the best version of themselves.

"These books exist because the Army was brave enough -- the BTS Army -- was brave enough to support my vulnerable moment and now it's become a part of my daily routine," he shared.

Cena explained that his books cater to both young and adult readers. It will help young readers learn how to approach certain subjects that they don't know how to discuss, while it will help adults reflect on themselves. He added that he is thankful to both BTS and the Army for playing a role in his books.

"I really gotta thank K Pop, I gotta thank BTS for supporting me in a moment of weakness and turning it into a passion of mine," he said.

Cena will appear on "Fast and Furious 9" as Jakob, Dominic Toretto's (Vin Diesel) long-lost brother. "F9" hits theaters on June 25.