The GR Yaris made its dynamic debut at an event, with some reports specifying it occurred at the Goodwood SpeedWeek or Festival of Speed, though the exact year is unclear. The event featured various cars, including those from Toyota and Lexus, with some outlets mentioning specific years such as 2021, 2024, 2025, and 2026. The details of the debut and the event itself are not entirely consistent across reports.