Kevin Jonas has asked brothers Joe and Nick to be his best men.
The Jonas Brothers singer – who got engaged to girlfriend Danielle Deleasa in July – couldn't choose between his siblings so decided to have them both by his side on his big day.
Danielle has two sisters so she will have two maids of honour at the ceremony.
Kevin – who has vowed to remain a virgin until his wedding night – proposed to Danielle after he turned up on her doorstep and got down on one knee.
Speaking about Danielle's reaction, Kevin said: "She said yes, yes, yes like 500 times super fast in a row."
Danielle - who met Kevin in May 2007 while on holiday in the Bahamas - added: "It still feels like a dream."
Kevin, 21, admitted he was nervous about popping the question.
He said: "It was tough performing last night, knowing that I was going to ask the biggest question in my life to the most amazing girl in the world."
Joe and Nick spoke of their joy at the engagement, saying on their Twitter page: "Congrats big brother... Dani welcome to the family, we can't wait to have you join us on the road!"