The Father of the Constitution of India is Dr. B.R. Ambedkar. He played a crucial role in drafting the Indian Constitution, which is the longest written constitution in the world. As the chairman of the drafting committee, Dr. Ambedkar ensured that the Constitution upheld principles of equality, justice, liberty, and fraternity. His vision aimed to create a society free from discrimination and inequality. Due to his remarkable contributions, he is fondly remembered as the "Father of the Indian Constitution."