Childhood obesity is a growing global public health concern, with significant negative health consequences for affected children in the long-term. Thus, preventing obesity in early childhood is important not only for optimizing child healthy growth but also for long-term health outcomes. Traditional approaches to obesity prevention in the early years of life, such as in-person interventions that target parents and family-level factors, have shown mixed degrees of effectiveness. Although there is growing evidence that early childhood obesity prevention initiatives implemented in the first 2 years of life can reduce child anthropometric measures (i.e., BMI and BMI z score), most of these effects were not sustained long-term. Faced with further accessibility and sustainability challenges in a post-COVID-19 pandemic world, emerging initiatives such as telehealth interventions have potential to address these barriers and concerns. Telehealth, traditionally used to refer to health consultations made over telephone calls, now comes to encompass a range of methods to deliver virtual healthcare. This includes but is not limited to text messages, web-based platforms, mobile health, and social media. It can offer advantages such as increased accessibility to healthcare from remote or underserved areas, flexibility and convenience, and the option for practitioners to provide ongoing remote monitoring and care. Research, such as the Communicating Healthy Beginnings Advice by Telephone (CHAT) trial, indicates that telehealth modes of delivery have potential to effectively reduce the risks of childhood obesity in the immediate and long-term. Continued research into and application of childhood obesity prevention delivered through telephone-based interventions and beyond is crucial to the future of maternal and child healthcare.