The actor, whose eight-year-old daughter Lily-Rose was hospitalized after reportedly contracting the E.coli bacterial infection earlier this year, insists nothing matters more to him than his family.

Johnny, who also has a five-year-old son Jack John with long-term partner Vanessa Paradis, said: "I wasn't sure if I would be able to come back."

"My kids and my girl - nothing else matters in life. My kids are very grounded, not monster-like at all. We keep discipline under control."

"When I was younger I used to play a lot of practical jokes and I p****d my mother off."

"But the greatest advice I ever got was from her, 'Don't take s**t from anybody. Ever.'"

"And that has stuck with me and I hope my kids never, ever have to take s**t off anybody either."

Johnny, who postponed filming new musical "Sweeney Todd: The Demon Barber of Fleet Street" when Lily-Rose was ill, also revealed he was nervous about his singing scenes in the movie.

He is quoted as saying: "I think I was probably more frightened than anyone."

"I've never even tried karaoke. It scares the hell out of me. I've never been that drunk - and I've been drunk."

"I didn't know if I could sing. I did these demos in my friend's garage studio because I didn't know if I could hit a note and to be honest I really didn't."

"I tried to use Iggy Pop as my inspiration. Someone is probably weeping after watching my performance."