This paper reviews the extant literature on emotion regulation (ER) in psychological interventions. First, we review current conceptualizations of ER, highlighting a model with established clinical utility (particularly with regard to the development of new interventions and modification of existing interventions). Next, we review the literature on the effects of psychological interventions on ER, from traditional cognitive-behavioral and acceptance-based behavioral interventions that do not target ER directly to treatments that directly target ER as one component of a larger or more comprehensive treatment, as well as the preliminary research examining ER as a mechanism of change in these treatments. Finally, extant data on three treatments developed specifically to address ER are reviewed, with an emphasis on the ER-specific treatment with the most empirical support to date (emotion regulation group therapy).