Denis Marti was born on October 4, 1972 in Nuoro, Sardinia, Italy, where he grew up inside the island before turning to the adult entertainment industry. His real name is Gianfranco Coitz, but he chose his stage name in his career, which helped keep his personal life discreet. He appeared with his athletic design and his attractive appearance, which quickly brought the producers' attention. In the adult entertainment industry around 1998, he started his career in Spain at 26, and soon succeeded in erotic films such as Sex Maniaco, Complulsion, The G.M. Affair, Ti Presento... Mio Fratellino, Prof. di Anatomia, as well as in productions from studios such as International Film Grup, where it has appeared in more than 400 scenes, often with colleagues known in collaborations, including hetero and intense scenes, while also active as directors, giving more than 50 films. In 2002 she won the FICEB Ninfa Prize for Sex Maniaco as Best Actor, praised for its versatility in the genre, where she contributed her Italian roots to the diversity of the European erotic segment, then lived in Prague, then moved to Los Angeles, where she continued to build her career, while protecting her private life strictly from the public and active in social media only with professional content. With his openness and professional attitude, he has gained a lot of credit during his intensive career, especially in the international mainstream erotic field.