Robert Tewsley was born in England and received his ballet training at the Royal Ballet School'in London.
In 1990 he became a member of the National Ballet of Canada, where he became a Soloist in 1993 and a Principal Dancer in 1994, In Canada, he danced leading roles in ballets by, amongst others, George Balanchine, Erik Bruhns, Peter Wright, Ronald Hynd and Rudoplh Nureyev. Choreographers such as Glen Tetley, John Neu-meier, James Kudelka and Jean Grand-Maftre have created leading roles for him.
In 1996 Robert Tewsley joined the Stuttgart Ballet as a principal dancer. Here he added leading roles in ballets such as Herman Schmerman, Love Songs (William Forsythe), Initials R. B. M. E. , Brouil-lards (John Cranko), The Four Temperaments, Stravinsky Violin Concerto, Tchaikovsky Pas de Deux (George Balanchine), Les Sylphides (Mikhail Fokine), 5 Tangos (Hans van Manen), The Rite of Spring and Voluntaries (Glen Tetley), Afternoon of a Faun (Jerome Robbins), Hello (John Neumeier) as well as Armand Duval in The Lady of the Camellias (John Neumeier) and Albrecht in Giselle (new production by Reid Anderson and Valentina Savina) to his repertoire, Furthermore, leading roles were created for him by Mauro Bigonzetti (in Kazimir's Colours), David Bintley (in Landscape and Memory), Jean Grand-MaTtre (in Exilium), Christian Spuck (DOS Amores) and Douglas Lee (Curtain of Hands).
He has made guest appearances with New York City Ballet, English National Ballet, National Ballet of Canada, Vienna State Opera Ballet, Teatro San Carlo (Naples), Rome Opera Ballet, Ballet de I'Opera de Nice, Theatre du Capitole (Toulouse),. Noriko Kobayashi (Tokyo), Teatro Comunale (Florence) and National Ballet of Croatia.
He has also danced at galas in London, Berlin, Hamburg, Toronto, Korea, Prague, Nervi and Vancouver.