The couple, who tied the knot in 1999, have worked together in movies like "Ishq", "Pyaar To Hona Hi Tha" and "U Me Aur Hum".
Talking about the importance of Kajol in his life, Ajay said: "I'm very lucky to have her in my life. She is a very strong support system for me."
The couple has two children - daughter Nysa and son Yug.