The 28-year-old, who starred opposite Alia Bhatt in the film, took to Twitter to thank producer Karan Johar and director Shashank Khaitan for giving him a chance.
"#1YearOfHSKD has to be the film that actually changed my life. I'm lucky I got to work with such talented people and thank you @karanjohar," Varun tweeted.
"thank you @ShashankKhaitan for working with me and teaching me so much and @aliaa08 you know why your special thanks man," he further added.
Not only Varun, but Alia and Karan also got nostalgic over the film's one year completion.
"Aaah #1yearofHSKD alreadyyy!!! Thank you Mr @ShashankKhaitan for creating Humpty and Kavya..AND for giving me Samjhawan @Varun_dvn," Alia tweeted.
Karan posted: #1YearOfHSKD ...super special love story... A true #saturdaysaturday memory!
"Humpty Sharma Ki Dulhania" was Alia and Varun's second film together after the duo made their Bollywood debut with Karan's "Student of the Year"