The grand finale week of Kaun Banega Crorepati 15 is approaching, with several celebs set to grace the show, including grandmother Sharmila Tagore. The show will wrap up on December 29 and promises to be a star-studded affair. Vidya Balan appeared on the show alongside Indian Para-archer Sheetal Devi, while India Cricketer Smriti Mandhana and Ishan Kishan also made appearances. One contestant even reached the 15th question and played for Rs 1 Crore, fulfilling a promise made to his mother.