Sunny shared the photo of his son, announcing he has started shooting for his Bollywood debut.
"Started #palpaldilkepaas .. Karan's first day at shoot.. can't get enough.. My boy has grown big #love #actor #life," Sunny wrote alongside the picture.
Bobby Deol and Rishi Kapoor also gave their best wishes to the young boy.
"Finally the day is here! Karan's first day at shooting #palpaldilkepaas, Overwhelmed!! Bhaiya donning the director's hat..#love #blessings," Bobby wrote.
Directed by Sunny, "Pal Pal Dil Ke Paas" is a love story that will be shot extensively in Manali.
Few days back Sunny also tweeted his photo with brother and actor Bobby, writing "On location!! #brothers #strength #manali #happiness #fulfillment #moments #family #palpaldilkepaas #ppdkp #film #creative #lovemyjob.