Son of Rodolfo Páez and Margarita Zulema Ávalos (she died when Fito was baby).
He and Cecilia Roth adopted son Martin, born in 1999.
Began a relationship with actress Cecilia Roth in 1992. They married on 23 December 1999, but separated in 2001.
Wrote the songs "Nada es para siempre" and "Fue amor" to his girlfriend Fabiana Cantilo after their break-up.
Daughter, with Romina Ricci, Margarita Páez was born on June 4, 2004.
Their album 'El amor después del amor', the biggest selling album in the history of Argentine Rock, was number 13 on Rolling Stone's Top 100 albums of Argentine Rock.
Was in an on/off relationship with actress Romina Ricci (2003-2012).
Former member of the Rosarinas bands: "Neolalia", "Sueñosía", "Staff", "El Banquete" and "Acalanto".
Keyboardist of the Charly García's band from 1983-1985.
Released his solo debut album, "Del 63" in 1984.
His mother died in 1963 and his father died in 1985.
In November 1986, his grandmother, great-aunt and grandmother's maid they were murderers in his house Rosario. This case was the inspiration for the song "Ciudad de pobres corazones".