American boxers Stanley Ketchell (1886-1910) (L) and Jack Johnson (1878-1946) touch gloves while squaring off in the boxing ring before their fight in San Francisco, Calif. Oct. 10, 1909.

Ketchel also played the role of “white knight” — figuratively, but also somewhat literally. In 1909, he agreed to fight heavyweight champion Jack Johnson, arguably the biggest fight of the year.

Boris Johnson's father Stanley, former footballer Dennis Wise, boxer Amir Khan and Coronation Street's Jennie McAlpine are going to the jungle for this year's I'm A Celebrity ...