Today is Raksha Bandhan, a Hindu festival that honours the bond between brothers and sisters. On this day, a sister will tie a thread around her brother – a symbol of her affection for him. The brother will in turn hand over a gift (generally money) as a token of his love for her. In doing so, he also offers her protection and support against the world. Here’s a look at how Bollywood’s celebs are marking the happy occasion.