In a series of photos from the event, the two express their love for each other on social media.
It was rumored that Jonas, 25, had put a ring on Chopra, 36, late last month, but the couple made it Instagram official on Saturday.
Jonas posted an intimate photo of him and his bride-to-be looking deeply into each other eyes (above), captioning the pic "future Mrs. Jonas. My heart. My love." Chopra posted the same photo and wrote, "taken.. With all my heart and soul."
The "Quantico" star also posted multiple photos that showed her and Jonas participating in a traditional Indian engagement roka ceremony. According to Indian Express, the ceremony -- held Saturday morning in Mumbai in front of both their families -- would be followed by another party later that night.
"The only way to do this... with Family and God," Chopra captioned the series the pics. "Thank you all for your wishes and blessings."
Last year, the pair posed side by side at the Met Gala, but said they were just friends at the time.
In the following months, Jonas and Chopra would be spotted on several dates, including a dinner date in New York City and a "Beauty and the Beast" live in concert in Los Angeles, before he popped the question.
"I couldn't be happier for my brother," he said on Instagram. "Welcome to the family @priyankachopra We love you."