Céleste Mordenti (born 25 January 2003) is a Luxembourgish artistic gymnast.

Mordenti was born in Munich, Germany in 2003 to a German father and a French mother.

[1] After finishing high school she moved to the Netherlands to attend Vrije Universiteit Amsterdam.

[2][3] Mordenti competed at the 2018 European Championships where she helped the Junior Luxembourg team finish twenty-fifth.

[5] In late 2024 Mordenti competed at the Szombathely World Challenge Cup where she won bronze on the uneven bars behind Charlotte Booth and Tonya Paulsson.