Bollywood star Aamir Khan is celebrating his birthday today and to make the day more special for him, his industry friends and colleagues have taken to social media to shower him with warm wishes. One of the most remarkable birthday wishes came from veteran actress and late Dilip Kumar's wife Saira Banu. She took to social media to recall Khan's long-standing affection for Dilip Kumar and the love Aamir has shown to Saira and her family over the years.