Transcript for Mick Jagger Secret Love Letters Paint Different Picture of Famed Ruffian
about mick jagger. BACK IN THE '60s, HE WAS Considered a drugy, a ruffian, and all-around troublemaker. Now, love letters have surfaced that call that reputation into question. John muller is here with more. Reporter: She is a singer and actress that gained notoriety in THE '60s AND '70s. But she's most famous for her relationship with that rock 'n' roll icon. Now, marcia hunt is putting her love letters from a young mick jagger up for auction. It is a rock 'n' roll anthem. Now, the woman said to be the inspiration for the song "brown sugar" is kissing, telling and cashing in. Marcia hunt, selling her love letters from mick jagger, penned in the summer of 1969. ♪ Brown sugar just like a young girl should ♪ Reporter: Her love letters from a young mick jagger are hitting the auction block. Hunt says she's broke, unable to pay her bills. Sotheby's will auction of the letters in mid-november. They are expected to fetch up to $160,000. "Jumping jack flash" is said to show the delicateness of poetry, like emily dickinson. Jagger's relationship with hunt, who was african-american, was kept under wraps until 1972. They produced a daughter named kariss. Hunt says, someone I hope will buy those letters, as our generation is dying. And with us will go the reali of who we were and what life was. Jagger also talked in the letters of an relationship with marry ann and the death of rolling stone guitarist, brian jones. Hunt, a high-profile picture of THE 1960s, IS NOW 66 AND LIVING In france. She says the letters speak for mick at an incredible juncture in our lives. The summer of '69 was the end of a whole era of revolutionary spirit. We didn't know it. It was about to die. ♪ I can't get no ♪ Reporter: While the letters have remained a secret, the affair has not. It will add to a well-compensated chapter in rock 'n' roll history. Despite the love letters and the softer side, it didn't last. A bitter paternity battle ensued between jagger and hunt. She plans to use the money from the love letters to do much-needed repairs from her home. I would be interested to hear his reaction. He's come a long way.
This transcript has been automatically generated and may not be 100% accurate.