The couple, got married 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.
The 43-year-old spoke about his life on a television show.