This is a randomized control trial to test the feasibility and efficacy of modifying hospital staff practices on the postpartum floor and intervening with parents before hospital discharge to help them quit smoking. Over 14 months, we assessed the smoking status of both parents of all newborns delivered at 1 hospital. Moms and dads who were current smokers (1 cigarette, even a puff, in past 30 days) or recent quitters (smoked since one month prior to conception) were eligible for the study. Enrolled parents were randomly assigned to the control or intervention group. The intervention included a brief motivational interview (MI), enrollment in the proactive state quitline, and follow-up faxes to the pediatric, OB, and PCP providers with tailored treatment messages.