"Sometimes when you don’t plan things - it all falls in place - Happy Birthday to my lovely Mr K!" Twinkle Khanna tweeted to her husband Akshay Kumar Saturday night. She hashtagged her tweet #birthday bumps. On Sunday, Akshay Kumar turned 51. The Kumars, and a few close friends, had brought in Akshay`s birthday Saturday night at a popular Mumbai eatery. The close friends included the actor Bobby Deol and his wife Tanya. Also see: Akshay Kumar@51: Films that made an actor out of the superstar Akshay wore a pair of grey trousers, a blue shirt, and black slip-ons. Twinkle wore a long black dress with a slit up to the upper thigh. (Image source: DNA) Bobby Deol, true to form, wore tight white jeans.