On Wednesday King of Romance Shah Rukh Khan celebrated his 51^st  birthday and has been receiving wishes and gifts from around the film industry, friends and fans. But that best wish came when Shah Rukh Khan's son Aryan Khan wished daddy cool. He wasn't able to attend the birthday bash of his father as he was recently enrolled in a university in America. But he took to Instagram and wished Shah Rukh in a cutest way and shared a picture with the caption - 'He can play like a kid, give advice like a friend and protect like a bodyguard. Happy Birthday to you. We love you boss man.'