Kenneth Weeks was born on September 30, 1889, in Chestnut Hill, Massachusetts, and pursued studies at the Massachusetts Institute of Technology before continuing at the École des Beaux-Arts in Paris. He was the son of Alice Weeks. A writer by vocation, he published five volumes of short stories and several plays before the outbreak of the First World War. Inspired by his attachment to France, Weeks enlisted in the French Foreign Legion on August 21, 1914. He served as a bomb-thrower during combat.

On June 17, 1915, he was killed in action near Givenchy, France, during heavy fighting. His body was not immediately recovered but was later found on November 25, 1915, and he was buried at the Ecoivres Communal Cemetery in Mont St Eloi. His name is memorialized on the wall of the Pantheon of Paris.