Mallory Wanecque (born 26 July 2006) is a French actress. She is known for her leading role in the debut feature film The Worst Ones (2022), for which she received the Rising Star Award for Best International Young Actor or Actress at the 2022 Rome Film Festival and was nominated for the 2023 César Award for Most Promising Actress.

Wanecque was born on 26 July 2006 in Valenciennes, Hauts-de-France. She attended the Jules Ferry school in Anzin. One day, leaving school with her younger sister in her arms, she met three women handing out flyers about a casting call and caught the attention of the casting director of The Worst Ones, who left Wanecque his number. She auditioned and then dropped out of high school to devote herself to a film career.

In 2022, Wanecque made her film debut with the leading role in the drama The Worst Ones, directed by Lise Akoka and Romane Gueret, for which she received the Rising Star Award for Best International Young Actor or Actress at the 2022 Rome Film Festival and was nominated for the César Award for Most Promising Actress in 2023. She then played a teenage boxer in Ali Marhyar's comedy Like a Prince (2023).

In 2024, Wanecque will appear in Teddy Lussi-Modeste's drama A Good Teacher and in Gilles Lellouche's romantic comedy-musical Beating Hearts.