Bradley Cooper says he had to delve into his painful past to extract the "truth" while making "A Star Is Born" and the actor has described the process as "very cathartic". The 43-year-old actor, who is making his directorial debut with the remake of the 1937 film of the same name, says channelising "dark stuff" into art is what makes the story relatable.

"Anytime you're trying to tell the truth you need to go to places and use things that have happened to you, or you've read about or experienced.