Apremilast (Otezla®) is an inhibitor of phosphodiesterase-4 (PDE-4) being developed by Amgen. It is approved in multiple countries worldwide, including the USA and those of the EU, for the treatment of adults with psoriatic arthritis, plaque psoriasis, or oral ulcers associated with Behçet’s disease. In April 2024, based on clinical data in patients aged 6–17 years, apremilast received its first pediatric approval in the USA for the treatment of pediatric patients aged ≥ 6 years and weighing ≥ 20 kg with moderate to severe plaque psoriasis who are candidates for phototherapy or systemic therapy. Apremilast was also approved in the EU in October 2024 for the treatment of moderate to severe plaque psoriasis in children and adolescents from the age of 6 years and weighing ≥ 20 kg who are candidates for systemic therapy. This article summarizes the milestones in the development of apremilast leading to the first pediatric approval for plaque psoriasis.