The couple, who first went public at the 2017 Met Gala, shared the same photo of them looking into each other’s eyes on their respective Instagram accounts.
Jonas, 25, wrote alongside the shot: “Future Mrs. Jonas. My heart. My love.”
Quantico star Chopra, 36, captioned it: “Taken… With all my heart and soul.”
They posted the photos after what Indian media described as a traditional engagement ceremony in Chopra’s home country.
Jonas is reported to have arrived in Mumbai with his parents on Thursday to attend the ceremony.
Chopra shared a series of pictures from the family event, which showed her fiance sporting a white sherwani garment – worn for formal occasions in India.
The former Miss World winner, who attended the wedding of Prince Harry and her friend Meghan Markle in May, wore a yellow embellished sari for the ceremony.
“The only way to do this… with Family and God. Thank you all for your wishes and blessings,” she captioned the post.
The couple underwent a series of rituals during their roka, which is typically followed by a thaka ceremony before the big day.
It ends weeks of speculation after an engagement ring was spotted in a photograph of Chopra and Indian actress Raveena Tandon.
The director of Chopra’s latest project also tweeted last month that Chopra was out of his Bharat film, tweeting: “Yes Priyanka Chopra is no more part of @Bharat_TheFilm & and the reason is very very special , she told us in the Nick of time about her decision and we are very happy for her…”