The Gauss Prize was presented to Junko Itô, the youngest daughter of the recipient, by King Juan Carlos of Spain. Kiyosi Itô could not attend the award ceremony for health reasons. Martin Grötschel, chair of the Gauss Prize Committee, announced the winner [available in PDF]. Before the Gauss Prize Lecture, that Hans Föllmer (HU Berlin) presented on Wednesday, August 23, 2006, Junko Itô read Kiyosi Itô's short thank you speech.