Pattie Boyd
Birtwell worked at home designing textiles for Clark, who would use his skill in cutting and understanding of form, together with her knowledge of fabrics and textures to produce haute couture for the 1960s culture. This included work for the Rolling Stones and Beatles, Jimi Hendrix and Pink Floyd, as well as Pattie Boyd, Marianne Faithfull, Bianca Jagger, Verushka, Paloma Picasso, Talitha Getty and numerous other celebrities.