LONDON, ENGLAND - FEBRUARY 05: Catherine, Duchess of Cambridge attends a training day for the Heads Together team for the London Marathon at Olympic Park on February 5, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - FEBRUARY 05: Catherine, Duchess of Cambridge attends a training day for the Heads Together team for the London Marathon at Olympic Park on February 5, 2017 in London, England. (Photo by Karwai Tang/WireImage)