Kate was just 21 when she received a nomination for Best Supporting Actress and was thrilled when the designer agreed to make a gown for her to wear to the prestigious event.
However, it didn't go down to well with the world's press but both Kate and Stella blame the high up-do she teamed the dress with.
She recalled: "Stella dressed me for my first red carpet event in 2001 for the Academy Awards. It was my first and only nomination. I was 21-years-old and to have Stella McCartney dressing me - well I felt like the hippest, coolest girl in the world. Up until the last minute Stella was working away, hand-sewing the hem. I woke up the next morning in my bed post-awards and without a little statuette on my bedside. I turned on the television to find out I was on every Worst Dressed list possible. So I called Stella and we just laughed our arses off and she said to me, "Look babe, it was The Hair wasn't it?"
However, Kate says she will wear the dress again but will style her tresses in more stylish way.
She said: "To this day that now vintage dress hangs in my wardrobe, but I swear one day I'll wear it again. But Stella, I promise I'll do the hair differently."