"Ketchup is one condiment which we use in our food all the time," Arjun told IANS.
"It is a habit that I love to have, and a chance to endorse a product I grew up eating won me over. Who does not like a bit of twist to their everyday food," added the actor, who has amassed a fan following with films like "Ishaqzaade" and "2 States".
Arjun also endorses men's grooming products and the healthier travel choice -- bicycles. But for Smith & Jones, he became a natural choice after "Ki and Ka".
In the movie where Arjun works opposite Kareena Kapoor Khan, he manages the home and kitchen duties with a flair.
Being part of the film, Arjun's ability to manoeuvre the kitchen convinced the brand to sign him up as their face.
"Arjun Kapoor has a chilled out acting style and a great sense of humour that has endeared him with his youthful followers. So he's truly an inspired brand fit and we're excited to have Arjun join us in a fun-filled adventure," said Ajay Gupta, managing director, Capital Foods.
With a versatile range of products in his kitty and an interesting film coming up to add to his daredevil image with "Khatron Ke Khiladi", Arjun has a tempting 2016 ahead.
