Carl Llewellyn (born 29 July 1965) is an assistant racehorse trainer to Nigel Twiston-Davies and a retired Welsh professional National Hunt jockey. Llewellyn won the Grand National on two occasions along with the Welsh Grand National and Scottish Grand National as a jockey. He has also won the Whitbread / Bet365 Gold Cup both as a jockey and as a trainer and many grade races.