Johann Kastenberger (born October 1, 1958, in Sankt Leonhard am Forst, died November 15, 1988, in Sankt Pölten, Lower Austria) was an Austrian marathon runner, bank robber and murderer. He infamously committed his crimes while wearing a Ronald Reagan mask, earning him the nickname "Shotgun Ronnie". Kastenberger's criminal life was the basis for the 2010 film "The Robber".
Kastenberger ran more than 25 miles.