This study investigates the impact of a Triple P Seminar Series on positive parenting for universal prevention of behavioural and emotional difficulties in a general Greek sample of parents with children aged 2 to 12. It is predicted that, compared to an attention control condition, parents randomised to the Seminar Series will report lower levels of children's disruptive and emotional difficulties at post-intervention. At the same time, it is postulated that parents will show a decrease in dysfunctional discipline styles, greater feelings of self-efficacy as well as lower levels of distress. Lastly, it is hypothesized that the effects observed at post-intervention will remain at the 6-month follow-up.