Declan Coyne is a former student at Degrassi Community School, who made his first appearance in Season 9's premiere Just Can't Get Enough. He is a calm, conceited, and a self-described child nomad, having traveled to four different continents with his father who is a diplomat, his mother, and his fraternal twin sister, Fiona Coyne, of whom he is very protective, which sometimes causes family feuds. His swift and sometimes deceiving acts could come off as arrogant. He has graduated from Vanderbilt Prep, and now is a sophomore at Yale, along with Holly J. Sinclair. He was also friends with Jane Vaughn. He was portrayed by Landon Liboiron.