In the Aditya Chopra directed romantic drama, Karan, 42, had played a cameo of a lovable, bespectacled sidekick of SRK.
"I have a lot of memories of 'DDLJ'. I started my career from there... It is and will be the largest part of my career. The film with its epic love story and innocence had set the barometer," Karan told reporters here at the trailer launch of Bollywood film 'Humpty Sharma Ki Dulhania'.
"After this, a lot of love stories were made but nobody could touch that bar. It is the pillar of love stories," he added.
Karan said that through 'Humpty Sharma..' he is paying tribute to 'DDLJ'.
"Our film ('Humpty Sharma..) is an ode to 'DDLJ'. One will see glimpses of 'DDLJ' but the love story is different from 'DDLJ'. We have made this film with honesty, integrity (and) with an intention to entertain people," he said.
'Humpty Sharma...' starring Alia Bhatt and Varun Dhawan is directed by newcomer Shashank Khaitan.
Karan has always mentioned the 1995 romantic comedy as one of his favourite films in the genre of romance.