Martin Scorsese has described Bob Dylan as an "ageless" talent.

The 'Raging Bull' director - whose documentary film 'No Direction Home' told the story of Dylan's life between 1961 and 1966 and his impact on popular music in the 20th century - has paid tribute to the singer/songwriter ahead of his 70th birthday on May 24, and claims he is virtually peerless as an artist.

He told AARP The Magazine: "Bob is ageless because he keeps turning new corners, beating down new paths, redefining himself and his art as he goes."

Scorsese is among a host of stars to pay tribute to Dylan, ahead of his landmark birthday.

Red Hot Chili Peppers frontman Anthony Kiedis penned a poem about how the 'Like a Rolling Stone' singer has inspired his music and life.

He wrote: "Bob Dylan is a wave. He's a moving body of energy built of melodies, words, rhythms, ideas, and attitudes that have swept over the world since the year of my birth."

Dylan's career has spanned a phenomenal five decades and he first rose to prominence as a protest singer in the 60s becoming one of the figurehead's of the anti-establishment and anti-Vietnam War movements In America.

Other artists who shared what the musician means to them in the publication included U2 frontman Bono, who, within a special essay about Dylan, wrote: "In short, all my life, Bob Dylan has been there for me."

American rocker Bruce Springsteen described the 'Blowin' In The Wind' musician as "the father of my country".