Amitabh Bachchan celebrates his 84th birthday today, October 11, and wishes have been pouring in from the film industry and fans across the world. Joining them, daughter-in-law Aishwarya Rai Bachchan took to Instagram to share an adorable, unseen picture of the veteran actor with his granddaughter, Aaradhya Bachchan.Sharing the photograph, Aishwarya wrote, “✨🎊Happy Birthday dearest Pa-Dadajiii💝💐🤗💖Love and God Bless always🧿🥰”In the picture, Amitabh is seen wearing a tracksuit and a beanie cap, while Aaradhya looks adorable with a hairband. Aishwarya has made it a yearly tradition to wish her father-in-law on his birthday by sharing a special picture of him with Aaradhya, offering fans a glimpse into their family bond.Amitabh Bachchan’s birthday celebrations coincided with his customary Sunday appearance outside his residence, a tradition that sees scores of fans gather to catch a glimpse of the megastar. For the occasion, the veteran actor stepped out in a dark maroon kurta, complemented by a brown-toned Kashmiri Kani pashmina shawl featuring intricate detailing.Security personnel and members of his entourage surrounded the platform, which was adorned with a massive red floral garland. The gathering also saw fans paying tribute to Bachchan’s illustrious film career, with several sporting outfits inspired by his iconic on-screen characters. Others held placards with birthday wishes for the actor.Earlier in the day, Bachchan took to his blog to express gratitude to those who made his birthday special through their warmth and thoughtful gestures.“They bring it in filled with surprises and warmth and grace .. for a most thoughtful evening – and morning .. and it remains with you, for all the likes of me were, what they meant on an evening this was designed ..” he wrote.On work front, Bachchan is busy with ‘Kaun Banega Crorepati’ season 18. On movie front, he’s working on the sequel to ‘Kalki 2898 AD’.