Jane Fonda
as Barbarella

John Phillip Law
as Pygar

Anita Pallenberg
as The Great Tyrant

Marcel Marceau
as Professor Ping

Claude Dauphin
as President of Earth

Milo O’Shea
as Concierge / Durand-Durand

Véronique Vendell
as Captain Moon

Serge Marquand
as Captain Sun

Catherine Chevallier
as Stomoxys

Marie Therese Chevallier
as Glossina

David Hemmings
as Dildano

Ugo Tognazzi
as Mark Hand

Giancarlo Cobelli
as Jean-Paul

Fabienne Fabre
as La femme arbre

Corinne Fontaine
as

Nino Musco
as

Umberto Di Grazia
as

Franco Gulà
as

Jean Saudray
as

Romolo Valli
as

Robert Rietti
as Professor Ping (voice)

Kitty Swan
as Girl in Sogo (uncredited)

Fabio Testi
as Tall Man at Party (uncredited)

Talitha Pol
as Pipe-Smoking Girl (uncredited)

Antonio Sabàto
as Jean-Paul (uncredited)

Honey Autumn
as Bald Handmaiden at Sogovian Court (uncredited)

Diane Bond
as (uncredited)

Silvana Venturelli
as (uncredited)

Carla Cassola
as (uncredited)

Joan Greenwood
as The Great Tyrant (voice) (uncredited)

María Teresa Orsini
as Suicide Girl (uncredited)

Chantal Cachin
as Revolutionary (uncredited)