Who was Sister Nivedita, whom Celina Jaitly is set to portray?

Actress Celina Jaitly is set to portray Sister Nivedita in her biopic. Born as Margaret Noble in Northern Ireland in 1867, she met Swami Vivekananda in London in 1895 and moved to Kolkata in 1898. She is regarded as one of the first foreign women to embrace Hinduism. She also promoted the cause of India's independence.