Following the COVID-19 pandemic outbreak in March 2020, distance learning has gained more attention from national and international education policies. This timely paper aimed to review the literature about digital competencies that K-12 and pre-service teachers require in order to succeed in supporting online learners during and post COVID-19. A critical question in this review pertained to how contemporary teacher education programs and teacher professional development can respond to the evolving needs of online learners. The findings showed that currently practicing K-12 teachers need more support around the technical, pedagogical, and content development associated with distance learning. In contrast, teacher education programs are urged to ensure that Information and Communication Technology (ICT) knowledge is well integrated into their curricular courses. Further, teacher educators must have the necessary ICT skills and experience to prepare competent K-12 teachers for distance learning. Conclusion and recommendations for teacher education policy and practice for distance learning are offered.