Gloin in Fellowship of the Ring
According to LOTR Wikia not only did John Rhys-Davies play Gimli, but also his father Glóin! Of course his father was more famously portrayed by Peter Hambleton in the Hobbit movies. But this was news to me, that Rhys-Davies did a double like that. Does anybody know anything more about it?
http://lotr.wikia.com/wiki/Gl%C3%B3in