Nick' parents, who came here for the traditional Indian pre-wedding ceremony, also attended the party with Priyanka's mother Madhu Chopra and brother Siddharth at the actress' residence.
Priyanka's cousin Parineeti Chopra and Siddharth Roy Kapur, producer of Priyanka's new film "The Sky is Pink", were among the first guests to arrive at the party.
Alia Bhatt, Anusha Dandekar, Mukesh Ambani, Nita Ambani and Isha Ambani also came to congratulate the couple, as did directors Vishal Bhardwaj, Sanjay Leela Bhansali and Siddharth Anand.
Salman Khan's sister Arpita Khan Sharma attended the party along with her husband Aayush Sharma and writer Mushtaq Sheikh.
Popular DJ Khushi played the music as the guests enjoyed the night. In some videos shared on social media, Priyanka, 36, is seen dancing away while Nick, 25, is seen shaking his head like a bobblehead.
A family picture also sees Nick and Priyanka kissing the former's parents on the cheek.
"What an amazing day of celebration for @nickjonas and @priyankachopra engagement and Indian culture," Nick's father Kevin Jonas Sr posted on Instagram.
This celebration followed a 'puja' earlier on Saturday, after which, Priyanka announced to the world, "Taken... With all my heart and soul", on Instagram with an intimate photograph with Nick.
Nick introduced her as the "Future Mrs Jonas", though the couple hasn't announced their official wedding date yet.
Several celebrities like Ranveer Singh, Hrithik Roshan, Alia Bhatt, Sonam Kapoor, Masaba Gupta, Shilpa Shetty Kundra, Diana Penty, Neha Kakkar, Bipasha Basu, Preity Zinta, Anushka Sharma, Sophie Chaudry and Malaika Arora sent in good wishes to the couple.