Piers Morgan wowed fans with a rare photo of his youthful-looking father Glynne Pughe-Morgan in a throwback snap to celebrate his birthday.The Good Morning Britain star took to social media to wish his father a happy birthday, but fans were left stunned over how young he looked.Taking to his Instagram account, Piers, 55, is seen posing alongside his father and daughter Elise in a snap taken last year.