What is already known on this subject? Literature on caring for stroke survivors focuses on negative outcomes (Ilse, Feys, de Wit, Putman, & de Weerdt, 2008) to the exclusion of positive outcomes such as post-traumatic growth (PTG; Calhoun & Tedeschi, 1999). Studies of a variety of health conditions have demonstrated that PTG occurs in patients and carers after illness events and is associated with well-being (Gangstad, Norman, & Barton, 2006; Helgeson, Reynolds, & Tomich, 2006; Kim, Schulz, & Carver, 2007). Exploratory studies and studies of benefit finding have shown that PTG occurs in stroke carers (Bacon, Milne, Sheikh, & Freeston, 2009; Buschenfeld, Morris, & Lockwood, 2009; Haley et al., 2009; Thompson, 1991), but there are no studies using standard instruments to assess PTG in this population. Moreover, current theories posit different explanations for PTG (Schaefer & Moos, 1992, 1998; Tedeschi & Calhoun, 2004), and there is a need for empirical tests (Park, 2010). What does this study add? This study extends knowledge by measuring PTG with a standard instrument in a sample of UK stroke carers and investigating associated variables. The study also compared the predictive power of the models of PTG proposed by Tedeschi and Calhoun (2004) and Schaefer and Moos (1992, 1998). PTG was found in UK stroke carers, but levels differed from cancer carers in other countries. Factors associated with PTG were identified; Tedeschi and Calhoun's model best predicted PTG. Deliberate rumination had a direct effect on PTG and also mediated the effect of social support. Deliberate rumination is a possible target for therapeutic interventions to enhance PTG.