The Old Alleynian Football Club is an open rugby union club founded as a team for the old boys of Dulwich College, themselves known as Old Alleynians. Founded in 1898, it is one of the oldest clubs in London and was the last of London's old boys clubs to become a fully open club. It is notable not only for its longevity, but also for the prominence it once attained on the club circuit and for the number of eminent players that have been members of the club, some of whom gained their international caps whilst at the club.