A source tells PEOPLE the couple got engaged a week ago on her 36th birthday while the two were in London.
Jonas closed down a Tiffany store in New York City to buy an engagement ring, according to the insider.
“They are so happy,” the source says.
Reps for both stars did not immediately respond to PEOPLE’s request for comment.
A Jonas source tells PEOPLE the singer is “very, very happy.”
“His friends and family have never seen him like this, and they’re all really excited for him. He’s definitely very serious about her,” the source says
Late Thursday night, Chopra’s director for the Indian film Bharat, Ali Abbas Zafar, announced the actress would be leaving his project in a cryptic tweet alluding to her boyfriend, which launched rumors among the Indian press the two stars were engaged.
The news comes just two months after the pair began dating in May. Over the last several weeks, the 25-year-old singer and the Quantico star have been spotted on several dates, including a dinner date in New York City and a Beauty and the Beast Live in Concert show in Los Angeles.
An insider previously told PEOPLE Jonas and Chopra stayed in touch after hitting it off last year but things really heated up between the pair when they introduced each other to their families.