In the letter, revealed in a new documentary about her life, Keys made clear how 'furious' she was at her father's failings, which included being absent for her birth.

In the letter, revealed in a new documentary about her life, Keys made clear how 'furious' she was at her father's failings, which included being absent for her birth.

Her father admitted he was "immature" and not ready for parenthood when she was born.