George Volonakis and Feliciano Giustino from the Materials Modelling and Design Group report in Advanced Materials Interfaces the latest advances on the computational exploration of the interactions between graphene and graphene oxide with lead halide perovskites. They also show how recent calculations from first principles have been employed towards understanding the benefits of combining these ‘wonder materials’. The paper was selected as cover image of the special section on "Interfacial engineering of perovskite solar cells for improved performance and stability".