As a special gift to his fan, actor Karthi has joined the microblogging site on his birthday. He goes with the handle @Karthi_Offl. Within hours, he has grabbed more than 15k followers. "Stepping into a new world and new experience. Thank you all for making me feel so loved!" Karthi tweeted. Twitter has already become a great hit among famous personalities, celebs and politicians to interact with their fans directly on a daily basis.
