LOS ANGELES, Feb 16 (Reuters) - Hugh Grant announced on Saturday that he had become a father for the second time after Tinglan Hong gave birth to a baby boy. "In answer to some journos (journalists)," the British actor posted on the social media website Twitter, "am thrilled my daughter now has a brother. Adore them both to an uncool degree. They have a fab mum." "And to be crystal clear. I am the Daddy," he added in a second tweet.