Sarcomeric hypertrophic cardiomyopathy is the most common cardiovascular genetic disease. Clinical evaluation and comprehensive echocardiography are crucial for the diagnosis and early evaluation of the hypertrophic phenotype, but multimodality imaging approach is often required to better define diagnosis and differential diagnosis from phenocopies. This review aims to assess the role of multimodality imaging and, in particular, advanced echocardiography and cardiac magnetic resonance in relation to differential diagnosis and preclinical diagnosis, identification of different phenotypes, and assessment of disease progression and risk of sudden cardiac death. A multimodality imaging approach is also crucial for the selection of patients amenable to surgical or percutaneous septal myectomy and for guiding both procedures.