Born in Rome, Dionisio made her acting debut when she was only 14 years old in John Schlesinger's Darling.^[1] The first director who gave her significant roles was Ruggero Deodato, who later became her husband.^[1] She got her first leading role in 1969, in Eat It.^[1] Mainly cast in roles of unscrupulous and luscious women, she mostly starred in comedies and crime films.^[1]

In the early 1980s, she left the film industry; her last appearance was in a liqueur commercial directed by Federico Fellini.^[1]

• Rita the Mosquito (1966)
• Pronto... c'è una certa Giuliana per te (1967)
• The Young, the Evil and the Savage (1968)
• Police Chief Pepe (1969)
• Pensiero d'amore (1969)
• Giacomo Casanova: Childhood and Adolescence (1969)
• A Girl Called Jules (1970)
• The Swinging Confessors (1970)
• Long Live Robin Hood (1971)
• Blood for Dracula (1974)
• My Friends (1975)
• Waves of Lust (1975)
• Live Like a Cop, Die Like a Man (1976)
• Il comune senso del pudore (1976)
• Bloody Payroll (1976)
• Fear in the City (1976)
• Il... Belpaese (1977)
• Il marito in collegio (1977)
• Lobster for Breakfast (1979)
• Terror Express (1979)
• Crimebusters (1976)
• Ciao marziano (1980)
• Murder Obsession (1981)

• Silvia Dionisio at IMDb  
• Silvia Dionisio discography at Discogs