Aged 13, she joined Colonel Wassily de Basil's Original Ballet Russe in Buenos Aires at the Teatro Colón, dancing with the company all over South America and in New York with George Balanchine.
She danced with the company in London from 1949 to 1954, in The Sleeping Beauty, Les Sylphides, Coppélia , Façade, Mam'zelle Angot, Swan Lake, Cinderella, Checkmate, A Wedding Bouquet, Apparitions, A Mirror for Witches, Bonne-bouche, Ballet Imperial, Giselle, Don Juan, The Three-Cornered Hat, Job, Daphnis and Chloe, Ballabile, Veneziana, Homage to the Queen, Tiresias, and Les Patineurs.
Olrich appeared in Pay the Piper (1954–1955), The Balcony (1957), Honeymoon (1957), the musical The Boys from Syracuse (1963), and the South African folk revue Wait a Minim!
"[4] She also appeared in many films including Women without Men (1956), Battle of the River Plate (aka Pursuit of the Graf Spee) (1957)[5] Kill Me Tomorrow (1957), Room at the Top (1959), Deadly Record (1959), It's All Over Town (1964), The Skull (1965), Clinic Exclusive (1972), Keep It Up Downstairs (1976), Riding High (1981), and Supergirl (1984).
She frequently appeared on British television in both dramatic and comedy roles, most notably an episode of The Avengers (1963), Fresh Fields (1985),[3] She-Wolf of London (1990), and as a game-show panelist in the popular series Whodunnit?