The Mother of All Lies (Arabic: كذب أبيض, romanized: kadib ʿabyaḍ, lit. 'White Lies') is a 2023 Arabic-language documentary film directed, written, produced and edited by Asmae El Moudir. The film explores the director's search for truth in her family background, combining personal and national history. It is a co-production between Morocco, Egypt, Qatar and Saudi Arabia.

The film had its world premiere at the 76th Cannes Film Festival, where El Moudir won the Un Certain Regard Best Director award. In December of that year, it became the first Moroccan film in the 20-year history of the Marrakech International Film Festival to win the Étoile d'Or, the festival's top prize. It was selected as the Moroccan entry for the Best International Feature Film at the 96th Academy Awards, and was one of the 15 finalist films in the December shortlist.