We found that security priming was associated with greater responsiveness and supportiveness toward a dating partner who was sharing a personal problem. Moreover, security priming overrode the detrimental effects of mental depletion on responsiveness and supportiveness. These effects were remarkably consistent across Israeli and American samples, and were unexplained by relationship satisfaction. Overall, these findings indicate that attachment security facilitates effective caregiving, and that experimental enhancement of security can counteract dispositional and situational barriers to compassion and helping.