Copely partnered with Duke Wensel in 2002.[2] They competed until 2004 on the Novice and Junior levels. From 2004 to 2006, Copely skated at the Junior level with Patrick Connelly.[3] She teamed up with Stagniunas in 2006 to compete for Lithuania. By the end of their partnership they were #10 in Europe and #14 in the World. Though they qualified, the team was subsequently prevented from competing at the 2010 Winter Olympics as Katherine was denied Lithuanian citizenship by then president Dalia Grybauskaitė[1]
Her brother is American ice dancer/coach/choreographer Dean Copely. Her mother is skating costume designer Sandra Copely. Katherine is currently training in Diagnostic Radiology,[3] with a sub-specialty in Musculoskeletal Imaging.