Kristian Cato Walby Kjelling (; born 8 September 1980) is a retired Norwegian handball player, who was part of the national team from 2001 to 2014. He last played for the Norwegian club Drammen HK. He is now their coach.
Before re-joining Drammen HK he played for the Spanish clubs Portland San Antonio and Ademar León and the Danish clubs AaB HÃÂ¥ndbold and Bjerringbro-Silkeborg and the Norwegian clubs KjelsÃÂ¥s, Vestli, and Drammen.
Kjelling won King's cup in 2002 and the EHF Cup-Winners Cup in 2004/2005 with Ademar Leon.