Sienna Williams

Sienna Williams

My name is Sienna, I am 17 and have been trampolining for 10 years now. High performance sport has taught me so much.

Current Campaigns

    ABOUT Sienna Williams

    Ellenbrook, WA

    Hi, I'm Sienna — a 17-year-old competitive trampolinist with 10 years of dedication and big dreams ahead.

    Trampolining is a thrilling but almost entirely self-funded sport. Between weekly training, competition fees, and travel for national and international events, the annual cost reaches over $30,000.

    In September 2025, I travelled to Gold Coast for the second time this year and became Under 22 Trampoline Champion. Following that I have now been selected on the Australian Team to compete in World Age Gymnastics Championships in SPAIN in early November 2025.


    Did you know Trampolining is an OLYMPIC SPORT?


    I am working hard every day to represent my country and push my limits, but I can’t do it alone. If you believe in supporting young, ambitious athletes chasing their dreams, your contribution will mean the world to me. Tax invoices are provided by ASF for all donations


    Thank you for helping me soar higher — both on and off the trampoline!!

    Acknowledgment of Country

    We acknowledge and pay respect to the Traditional Owners and Elders—past and present—of the lands on which the Australian Sports Foundation operates. We extend this acknowledgment to the Traditional Owners of Country throughout Australia and recognise their continuing connection to land, waters, and community.

    At the ASF, we celebrate the diversity and strength of Aboriginal and Torres Strait Islander peoples and their significant contributions to Australian sport and society.