Two correlational studies sought to identify possible predictors of individual differences in naturally occurring mindfulness. In study one, trait anxiety and attachment anxiety, but not attachment avoidance, were negatively predictive of mindfulness. In study two, trait anxiety (−) and attentional control (+), but not openness or parental nurturance, predicted mindfulness. In addition, there was evidence of a partial mediation effect of attentional control on the association between trait anxiety and mindfulness. Key features of trait anxiety such as attentional and interpretative processing biases, as well as those of attachment anxiety such as rumination and hypersensitivity, are at odds with mindfulness characteristics such as attention to what is present coupled with an attitude of openness and acceptance. Thus, whether generalised or specific, anxiety appears to be antagonistic to mindfulness; control over one’s attentional resources may form part of the underlying explanation.