Before the 2002 Winter Olympics in Salt Lake City, Ammann crashed and suffered injuries during training in Willingen.

During the Olympics, Ammann gained international attention not only for his victories but also for his youthful and bespectacled appearance on the podium that many compared to Harry Potter.

This earned him the Holmenkollen medal in 2007 (shared with Frode Estil, Odd-Bjørn Hjelmeset, King Harald V, and Queen Sonja of Norway).

On 24 February 2007, he won his first medal at the FIS Nordic World Ski Championships with a victory in the individual large hill in Sapporo, Japan.

[citation needed] Ammann also competed in the 2018 and 2022 Winter Olympics, with his best finish being eleventh place in the normal hill event in 2018.