Australian fashion model and 2022 Miss Universe finalist, Sienna Weir, has passed away at the age of 23 due to a tragic horse-riding accident, according to the sources. The incident occurred last month at Windsor Polo Grounds in Australia, where her horse fell, causing fatal injuries. As per reports, Sienna was kept on life support for several weeks before her family made the difficult decision to take her off on May 4. Sienna's family confirmed the news of her passing, and her modelling agency, Scoop Management, posted several photos of her on Instagram with the caption "Forever in our hearts."