The 40-year-old producer reunites with the Kuch Kuch Hota Hai star in Student of the Year.
He told the Hindustan Times: "Kajol is in the disco song and she has danced with the boys Siddharth Malhotra and Varun Dhawan.
"Kajol's presence is very important for me. She has been there in every film of mine and she has always been lucky.
"I don't like breaking tradition, I am a creature of habit."
Kajol has previously denied that her acting career stalled after her marriage to Ajay Devgn.
In June, the producer held a party at the location where he filmed his 2006 hit Kabhi Alvida Naa Kehna.
Watch the trailer for Student of the Year below: