Mental and substance use disorders are leading contributors to the burden of disease among young people in Australia, but young people experience a range of barriers to accessing appropriate treatment for their mental health concerns. The development of early intervention services that provide accessible and effective mental health care has the potential to reduce the individual and community burden associated with mental health problems. Collaborative care arrangements between general practitioners, psychologists and other service providers are a key component of comprehensive and integrated early intervention services, with evidence-based psychological treatments an important part of these collaborative mental health care models. Recently, the Australian Government funded "headspace" (the National Youth Mental Health Foundation) to promote and support early intervention in youth mental health by establishing accessible and collaborative models of enhanced primary mental health care for young people with emergent mental and substance use disorders. Clinical psychologists in the "headspace" Community of Youth Service and other settings will play a key role in providing early and effective interventions within multidisciplinary collaborative care arrangements.