Behrens was a student at the Slade School of Fine Art and formed part of the tightly knit group of artists and intellectuals who frequented the Colony Room (John Deakin's famous photograph, Lunch at Wheelers, is of Behrens, Freud, Bacon, Auerbach and Andrews, the Soho drinking club where Lucian Freud and others such as Francis Bacon spent much time during the late 1950s and the early 1960s. Behrens posed in Freud's small Paddington studio for a portrait in 1962 (Red-Haired Man on a Chair) and 1963, and was also the subject of a portrait by Michael Andrews (permanent collection of the Thyssen-Bornemisza Museum). He has exhibited in Spain and Britain.
- Photograph by John Deakin, Lunch at Wheelers: Timothy Behrens, Lucian Freud, Francis Bacon, Frank Auerbach and Michael Andrews, 1962
- Terry Kirby (20 December 2004) "Celebrities and bohemians come together for Lucian Freud sale", The Independent.
- Red-Haired Man on a Chair
- Michael Andrews, Portrait of Timothy Behrens, 1962