Attachment style theory by Bowlby (1962) states that infants have a primary goal to bond with and maintain proximity to their caregiver, which evolved for survival purposes. Ainsworth later identified four attachment styles: secure, avoidant, anxious and disorganised attachment styles. These attachment styles formed in childhood were suggested to be associated with one’s future emotional and social development, communications and interpersonal relationships in adulthood. This study aims to examine whether attachment styles at age 3 predict an individual's well-being at age 23.