Bollywood filmmaker Karan Johar today announced that he had become father to twins - a boy and a girl - through surrogacy. Introducing the children as Roohi and Yash, Mr Johar in a statement he tweeted said the children were the "two most wonderful additions to my life and lifelines". The children were born last month in Mumbai's Masrani Hospital where Shah Rukh Khan's third child AbRam was delivered also by a surrogate mother, according to media reports.