Peter Berg

I've been a big believer in musicians turned actor, going back to Sinatra winning the Oscar for 'From Here To Eternity.' David Bowie in 'Man Who Fell to Earth,' Kris Kristofferson's been great in a bunch of films. Liza Minnelli, Barbra Streisand, Mariah Carey, I thought was great in 'Precious.'

Sweating the small stuff is important in boxing and life. On a movie, we have production assistants who're 18 and 19 years old. If someone asks you for a cup of coffee, and you bring them a cup of coffee that's cold, I make a big deal of that. I make a really, really big deal of that. You have to pay attention to details.

The importance of heart health became very real for me when my father died of heart disease seven years ago. Having experienced the loss first hand, I am inspired to do everything I can to break the cycle and prevent families from losing loved ones to this preventable disease.

Boxing is like chess. You encourage your opponent to make mistakes so you can capitalise on it. People think you get in the ring and see the red mist, but it's not about aggression. Avoiding getting knocked out is tactical.