Everything was against Marie-Agnes Gillot becoming a ballerina -- never mind a great one.

She was too tall, broad-shouldered and most of all, she had a double scoliosis, which sometimes gives her a hump when her back is swollen.

Yet the hump disappears as if by magic when Gillot takes to the stage.

"I have a limited time to stay standing, carried by my muscles and myself," said the star, who accepts "that with time passing I'll be going back into my corset, unless I accept the operation, the metal rod in my back".

On Saturday night Gillot will close an extraordinary chapter in modern French ballet when she takes her final bow at the Paris Opera Ballet in "Orpheus and Eurydice".

The last great French ballerina of her generation, she hid her problem from her teachers after leaving home at nine to go to ballet's elite school in the French capital.

"When I arrived I thought who are these nasty skinny ladies?"

Not wanting to be thought of as "handicapped", only her roommates knew her secret.

'Nobody gave me free pass'

"Nobody gave me a free pass" in her long rise to the top, the dancer told AFP. In fact it was the opposite.

She did not make principal dancer until relatively late at 28 by which time even the great choreographer Maurice Bejart had become exasperated, declaring, "she was the best they have, and finally they decided".

Unlike her predecessor, the legendary Sylvie Guillem whose passage she said was eased by Rudolf Nureyev, she had no such powerful mentor.

When Gillot was eventually named as a prima ballerina she made history as the first ever to be promoted in Paris for a modern piece.

"I think we have a hard time managing exceptional people in France who have a lot of energy, who have strong minds, who have abnormal abilities. And not just in ballet," she said.

Gillot was no doubt that it was because she was "too talented that they would not accept any mistakes from me. They were super tough with me but with the middling types they said, 'Don't worry, we will let you through'.

Ran away to New York

"People before me who fell (during their final test) and people after too went on to be principal dancers while I could not make the smallest error."

Only when she "ran away to New York" at 18 was she freed from "sweeping the floor" and given the roles she felt she deserved.

"I've been described with adjectives like athletic, tall, atypical, rebel and punk since I was very little. But I don't see it!" she laughed.

"I see myself as a good soldier with a lot of discipline who has embraced all types of dance and never given classical or contemporary priority."

Gillot, 42, has been branching out into film, fashion -- working with Chanel, Hermes and Repetto -- and art in recent years, even saving her sweat in little jars for one project.

She also has a collection of poems in the pipeline.

But as the only female French choreographer to have her work staged at the Paris Opera, dance still fires her.

She is passionate about righting wrongs in dance education, telling AFP that some elite schools "stifle" young dancers creativity.

"I would develop children's curiosity by bringing them to the theatre to see great actors... or even to fashion shows where they've made clothes out of bin bags so that they have creativity in them instead of just commands and orders all the time," she said.

"We cannot break 10,000 children for one little prodigy. We have to cherish their imagination and not rein it in," she told Paris Match magazine earlier.

Critics' gripes about the lack of great charismatic dancers may be because of the way dancers are drilled.

"You can be a great dancer but without personality," she said.

With her warm, throaty laugh, personality is not something Gillot lacks.

Having spent the last three months tearfully "grieving" her exit from an institution where she has spent most of her life, "now I just want to get on with it", she laughed.

Still there are memories that will remain with her forever, the greatest of which was "dancing with my son in my tummy at seven months. I would lift up my leg and he would get in the way. But it is amazing what the body can do."