Nathaniel “Noddy” Reilly-O'Donnell (born 13 April 1988) is a British rower educated at St Leonard's School, Durham and University College London.

As a Great Britain squad captain at the 2007 Youth Olympic Festival in Australia, Noddy won three medals: two golds in the coxless four and the pair, and a silver in the eight.

At the 2011 World Rowing Championships in Bled, Nathaniel and crew mates Alex Partridge, James Foad, Cameron Nichol, Moe Sbihi, Greg Searle, Tom Ransley, Daniel Ritchie and Phelan Hill won a silver medal in the men's eight.

[1] During the 2011 World Cup Series he raced in the men's eight, taking a silver medal behind Germany in Munich and a bronze in Lucerne.

[2] In the 2015 season he won gold in the men's four at the 2015 European Rowing Championships in Poznań, along with crewmates Alan Sinclair, Tom Ransley and Scott Durant.