Big news came in on Sunday morning and it was something that none of us expected to happen. Karan Johar became a proud father to two children, a baby boy and a baby girl. The news has taken Twitteratis as well as the film fraternity completely by surprise. Meanwhile, congratulatory messages have already started pouring in on Twitter from the film fraternity. Let's have a look at some of the tweets: Karan your the best human being I know and Im sure you will make the best dad.Can't wait to meet these lil munchkins. Finally I can say I have a younger brother AND sister!!!!!! So so so happy soo much love to give uff bursting with joy!!!!! Congratulations-welcome 2 parenthood Karan-this will B the most satisfying N rewarding aspect of UR life.God Bless the young ones. Congratulations @karanjohar n Hiroo Aunty!Wishing u joy n happiness in ur new chapter of life as parent. God bless Yash n Roohi. CONGRATS!!! @karanjohar like u had said on my show"dharma needs an heir.."now dharma has...love their names. Heartiest Congratulations my dearest @karanjohar thrilled beyond words. love to lil angels Roohi and Yash and big big hug to Hiroo aunty. Glad u took my advice seriously @karanjohar Best thing to happen to you.. n theyll b the youngest people you hang out with so all's good. Interestingly, Karan is not the only celebrity to become single father, earlier Tusshar Kapoor, too, had baby boy Laksshya through surrogacy.