The 42-year-old actress, who is currently busy with the promotions of her husband Ajay Devgn's upcoming film "Shivaay", launched her Facebook page at its headquarters in California and shared the news with her fans on Twitter.
"I'm finally on @Facebook now and so excited to have launched it at the Facebook HQ. Thanks for the lovely tour guys," she wrote.
The actress also posted a picture of herself along with Devgn, who was also present at the launch.
Kajol inaugurated her page with a small video in which she is seen sitting in a car and talking to her fans.
The actress looked excited and also wished her mother, Tanuja, a very happy birthday in the video.