The aim was to investigate the association between experiencing a therapeutic relationship and subsequent authenticity. Forty-six clients completed the Barrett-Lennard Relationship Inventory (B-LRI), Relational Depth Inventory (RDI), a measure of the therapeutic alliance (ARM-5) and the Authenticity Scale (AS) at intervals over 10 therapy sessions. Higher scores on the B-LRI at sessions 3, 5 and 10 were associated with an increase in authenticity over the 10 sessions. These results provide some initial evidence in support of Rogers's (1957) theory that it is the conditions of the therapeutic relationship that lead to greater authenticity.