The actress, who gained international fame with her role in TV series "Quantico", was challenged by Fallon for the eating contest and got beaten by her when she came on his chat show.
On offer were spicy chicken wings and both added a lot of Tabasco sauce on them.
Priyanka has never shied away from admitting her love for food. And she flaunted her 'foodie' spirit unihibitedly. Perhaps Fallon underestimated her assuming that a fit, toned girl such as Priyanka would never beat him in an eating contest.
During her appearance, the former beauty queen even had Fallon say, "Namaste, aap kaise ho India!" (Namaste, how are you India?). She even spoke of her stint as Miss India and Miss World in 2000, as also about her experience of filming her Hollywood debut "Baywatch" in Miami.
The episode featuring Priyanka will be aired in India on Comedy Central on Friday night.
Meanwhile, it is her shooting commitments that are keeping her busy in the US.
In "Baywatch", Priyanka has been roped in to play a negative role, and she is living it up in Miami.
One of the most watched TV shows globally, "Baywatch", was about the Los Angeles county lifeguards who patrol the beaches of Los Angeles, California. It starred David Hasselhoff and Pamela Anderson among others.
On the home turf, her latest project, filmmaker Prakash Jha's upcoming film, "Jai Gangaajal", released on Friday.