Sky Atlantic is preparing to debut the Johnny Depp presented documentary on legendary and radical British artist, Ralph Steadman. Steadman is best known for his illustrations for US author Hunter S. Thompson, another of Depp's close friends until his death in 2005.

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The film's director, Charlie Paul, is said to have spent 15 years amassing the footage and creating the amazing animations of Steadman's art that we see on film. The animations echo the energetic power of Steadman's distinctive drawings.

Entitled For No Good Reason, the documentary will air next year as part of the channel's Documentary Films Season. The film is the first to be announced in the new raft of documentaries telling the greatest stories from around the world, by some of the finest writers, directors and producers at work today, reports ATV Today.

Watch The 'For No Good Reason' Trailer:

Depp will guide the viewer through an exploration of Steadman's remarkable life; a man widely considered as one of the most important British illustrators of our time and a gonzo journalism pioneer. The film looks at the power and importance of Steadman's work referencing his aim: "I learnt to try to change the world."

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Steadman and Thompson changed journalism forever in the seventies with their best-known collaborations, Fear and Loathing in Las Vegas and Fear and Loathing on the Campaign Trail '72, which cast a drug-addled eye over a dark and seedy world with a slight derangement.

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Steadman and Hunter met when, in 1970, Ralph was asked to draw a piece for the Kentucky Derby for a piece that Thompson was writing "I was told that the writer would be this 6ft 5in ex-Hells Angel with a shaved head who would be carrying a doctor's bag. I was given his name, Hunter S Thompson, but it meant nothing," Thompson recalls of his friend who apparently took a disliking to him at first.

"I really didn't think we'd have anything more to do with one another. I thought he didn't particularly like me, or my work. But apparently he'd noticed a certain. intensity of my response to subject matter which he did like," he said in an interview.

The film's website reads: "JOHNNY DEPP pays a call on his friend and hero RALPH STEADMAN and we take off on a high-spirited, lyrical, raging and soulful journey discovering the life and works of one of the most important radical British artists of modern times. Through Depp's lead in this intimate portrait, we are able to reach to the heart of what make this artist tick, his friendships and fallings out, his love for art and passion for civil liberties."