Dubai: Bollywood stars Katrina Kaif and Vicky Kaushal have given fans a special Diwali surprise, revealing the face of their son Vihaan for the first time in an adorable family photograph shared on Sunday.The heartwarming picture, posted by Katrina on Instagram, comes just a day after Vihaan celebrated his first birthday on November 7, making this year's festival of lights particularly memorable for the celebrity couple.Dressed in traditional festive outfits, the proud parents are seen sitting on the floor with their little boy between them. But it is Vihaan's infectious smile that steals the show.The toddler, wearing a cream kurta-pyjama with a beautifully patterned yellow Nehru jacket, beams at the camera while his parents look at him affectionately.