Today's critical infrastructure systems are more interconnected and dependent on the electric power grid. This interdependence means that disruptions in one system can have far-reaching consequences across many others. This is particularly evident when a cyberattack in the power grid leads to widespread outages and disrupts essential societal services. To prevent such disasters, it is crucial that proactive actions are taken to secure our power grid control centers and digital substations. This is where digital twins (DTs) play an important role: By creating virtual replicas of cyberphysical assets and processes, DTs allow system operators to anticipate and address potential vulnerabilities in our cybersecurity defenses before they can be exploited. As such, a DT can be considered as a key contributor to safeguard the power system against cyberattacks. This article examines the potential future benefits of DTs in enabling a cybersecure and resilient power grid, explores multiple use cases, and proposes a path forward.