Born in Rome, after graduating from a Technical-Commercial school Filippini studied music and chant and later entered the Sistine Chapel Choir.

[1] In 1963 he won the Castrocaro Music Festival, and in 1964 he entered the competition at the Sanremo Music Festival with the song "Sabato sera", which was also a moderate success on the Italian hit parade.

[1] In 1965 he returned at the Sanremo Music Festival, becoming successful with the song "L'amore ha i tuoi occhi".

In 1968 he was invited by Franco Zeffirelli to perform the song "Canzone d'amore/Ai giochi addio" in the Italian release of his Romeo and Juliet film (voiced by Glen Weston as "What is a Youth" in the English-language release).

When his success declined in the 1970s, he focused on live performances in piano bars and music halls, as well as appearances on several revival TV-programs.