It was said that Kunal and Naina will tie the knot this year, but when asked about the marriage plans, he said: "We haven't decided on that as yet. As and when we do, we will let you know."
Kunal met Bollywood's first family at Abhishek Bachchan's birthday bash on Feb 5.
At the Top Gear awards, when asked how was it meeting the Bachchan family, he said: "I have known the family for a long time, it wasn't new to meet them."
Kunal, 36, known for his work in "Rang De Basanti" and "Luv Shuv Tey Chicken Khurana", has just wrapped up shooting for "Kaun Kitne Paani Mein", a film on water crisis.
Naina is Amitabh's younger brother Ajitabh's daughter.