(Born February 20, 1937) is an Italian actor, singer and showman. Son of the singer Nino D'Aurelio, his son is the singer Gianluca Guidi.
Born as Giorgio Guidi in Meda, he debuted as singer in the late 1950s for CGD label. In 1958 he won the Sanremo Festival in duo with Domenico Modugno, with the songs "Nel blu dipinto di blu" (also known as "Volare") and "Piove (Ciao ciao bambina)". "L'immensità" earned Dorelli a ninth place at the 1967 edition of the Sanremo Song Festival.
His greatest success was the musical Aggiungi un posto a tavola, which was also performed at the Adelphi Theatre in London's West End in an English version entitled Beyond the Rainbow in 1978.
After a period of absence, he returned to success in the 1980s. In 1983, he played St. Philip Neri in Luigi Magni's TV film State buoni se potete. Dorelli's latest feature film role is in Pupi Avati's Ma quando arrivano le ragazze (2004).
After marriages to actresses Lauretta Masiero and Catherine Spaak, he is currently married to Gloria Guida, a former actress.