Charles Marc S. De Ketelaere (Dutch pronunciation: [də ˈkeːtəˌlaːrə]; born 10 March 2001) is a Belgian professional footballer who plays as an attacking midfielder or forward for Serie A club Atalanta and the Belgium national team.

[6] On 20 October 2020, De Ketelaere scored the game winning goal in the 93rd minute to defeat Zenit St. Petersburg 2–1 in the group stage of the 2020–21 UEFA Champions League.

[8] Signed for a fee reported to be in the range of €35 million, De Ketelaere however failed to fulfill the initial expectations of the Rossoneri, scoring no goals throughout the entire season and making only nine league starts.

[12] On 21 September, De Ketelaere marked his presence by netting his first goal in a UEFA Europa League group stage match against Raków Częstochowa, contributing to Atalanta's 2–0 victory.

[13][14] De Ketelaere scored 14 goals and provided 11 assists in all competitions during his first season at Atalanta; the club made his move permanent on 15 June 2024.