Early childhood provides excellent opportunities for growth, yet it is also when children are most vulnerable to neglect and abuse. Policies prioritise mental health, particularly recommending the promotion of good parenting, attachment and infant mental health (IMH) (Scottish Government 2009a, 2009b, Department of Health 2011). However, there is still a lack of evidence, research and funding directed at preventing mental health problems. When presenting mental health education to a group of pregnant teenagers, an opportunity arose to apply social marketing principles to raise awareness of and promote IMH. The aim of the campaign was to increase young mothers’ awareness of and improve understanding and skills in IMH and bonding. An adapted ‘marketing mix’ (4Ps) – product, price, place and promotion – method was used to promote the benefits of behaviour change to the target audience. The combination of a quiz, presentation of adapted IMH resources and consultation with young pregnant women resulted in the co-creation of a leaflet, which was approved for use across Dumfries and Galloway last year. This article describes a co-production approach to engagement with pregnant teenagers and the resulting social marketing campaign to promote IMH called Bonding for Brilliant Babies.