'Dishkiyaoon', also starring Sunny Deol in the lead, marks the debut of actress Shilpa Shetty as a producer.
"Congrats Harman.. And good luck to the team Shilpa Shetty Show some love twitterverse," Priyanka tweeted.
Priyanka, 32, and Harman, 33, starred in films like 'Love Story 2050' and 'What's Your Raashee?' and there were rumours that they dated briefly.
'Dishkiyaoon' is about the Mumbai underworld and is expected to hit theatres on March 28.