The ongoing pandemic has dramatically disrupted daily life, increasing the risk of developing psychiatric disorders and poor mental wellbeing. The compound effects of social, political and psychological stressors have increased psychological symptoms among adolescents and young people, with worries about COVID-19 playing a central role in the clinical course of their mental health problems caused by the pandemic. The aim of this cross-cultural study was to examine the social psychological effects of COVID-19 on adolescents' and young people's mental health and wellbeing in Ibero-American population. Participants involved 6,283 adolescents and young adults from five different Spanish-Speaking countries (83.7% female) aged between 12 and 30 years (