The 'Lekar Hum Deewana Dil' actor was welcomed by his industry seniors Abhishek Bachchan and Karan Johar on the micro-blogging site.
"Guys please give a very warm welcome to my little cousin brother, who very soon is going to be huge. @TheArmaanJain welcome to the chaos!," Abhishek tweeted.
Karan tweeted, "Introducing the new age super kid on the block!!! @TheArmaanJain .... Welcome to the movies Armaan!"
Armaan has so far 2000 followers on Twitter.