Mental health problems among adolescents are highly prevalent across the world, with international rates ranging from 10% to 20% (Collishaw, 2015; Kieling et al., 2011). In Australia, the 12-month prevalence of mental disorders has been estimated at 13.9% with the most common disorders being behavioural (e.g., attention-deficit/hyperactivity disorder and conduct) and anxiety disorders (Lawrence et al., 2016). Similar overall and disorder-specific prevalence rates have been reported in the United States (Ghandour et al., 2019), the UK and Europe (Collishaw, 2015), with data indicating stability in prevalence over time (Ghandour et al., 2019; Lawrence et al., 2016). Clinical diagnosis and treatment of mental health disorders in adolescents has also been shown to be increasing over recent decades (Collishaw, 2015) indicating significant burden on individuals, families, communities and health systems.