Jonas, 21, said he did it the classic way: He showed up at her doorstep early Wednesday, dropped to one knee, offered up a diamond ring and asked Deleasa, 22, a former hairdresser, to marry him, People.com reported exclusively. He traveled to New Jersey after the pop group's concert appearance in Vancouver, British Columbia.
"She said yes, yes, yes like 500 times super fast in a row," he said.
The couple met while vacationing with their families in the Bahamas two years ago. People said a wedding date hasn't been set.
Taking Kevin off the marriage market depletes the supply of available Jonas Brothers by 33 percent. Joe and Nick are still available, though.
"Congrats big brother. ... Dani welcome to the family, we can't wait to have you join us on the road!" they tweeted.
Notable deaths of 2014 [PHOTOS]
Kelly Ripa's penthouse sells for $20M