Vietnamese Americans are disproportionately affected by preventable late-stage cancers. This study capitalizes on the protective role of family networks to develop an online social media family group chat intervention promoting cancer screening among Vietnamese American families. A feasibility study was conducted to assess implementing "Let's Chat," a 4-week intergenerational family group chat intervention to increase cancer screenings. Vietnamese American young adults were trained to act as family health advocates on their private family group chats and share cancer screening messages. The intervention covered material on recommended screenings for colonoscopy for those aged 45+ years, HPV (human papillomavirus) vaccination for young adults, and Pap testing for women. Ten families (n = 41) participated. Family group chat content analysis resulted in (a) sharing personal screening experiences, (b) family members being prompted to schedule cancer screening appointments after discussions in the chat, and (c) family members expressing a sense of urgency to follow up with cancer screening. Postintervention survey results revealed that 48% of participants received screening/vaccination, 77% reported intent to schedule an appointment to discuss recommended screenings, 61% reported discussing cancer screenings outside their group chat, 84% felt comfortable discussing screenings with family after the intervention, and 68% agreed that the group chat facilitated comfort around cancer screening discussions. Family members reported feeling closer to their family and greater comfort discussing cancer and cancer screening. Results from the "Let's Chat" feasibility study indicate promise for implementing a randomized trial conditional on grouping family chats by age and gender to increase cancer screenings among Vietnamese American families.