Mimoh the eldest son of Mithun Chakravorty has never called him 'papa' but has preferred to call him by his first name. Apparently even at age three, Mimoh could not speak a word which worried his father Mithun and mother Yogita Bali.
Mimoh started with 'Mi' which was later followed by "Mithu' and finally the boy managed to utter 'Mithun'. Mimoh could only manage to say Mithun for quite some time and since those were his first words, the indulgent papa preferred his son calling him by his name.
Mithun is very emotional about this and is very close to Mimoh too.