"A big congratulations to Joe," brother Kevin Jonas, 20, said before a Los Angeles taping of MTV's new music show FNMTV on Friday. "He just graduated from high school. It happened yesterday so it's a big deal."
Joe, 18, who took correspondence courses while touring, said he was relieved to have sent in his last high school assignment on Thursday. "I haven't heard from the school yet. But I'm officially done with the work," said Joe, who "played a concert" to celebrate.
The Jonas Brothers also confirmed they will perform at their first MTV Video Music Awards in September.
"It's pretty amazing," said Kevin. "You grow up watching the VMAs. You know the performances, you see the pictures in every magazine."
The Jonas Brothers plan to perform the second single from their new album A Little Bit Longer, due Aug. 12, for the first time on live TV at the VMAs. "It's going to be an exciting performance," says Nick Jonas, 15. "We're going to involve the fans in it."
Fans to Vote in VMAsThe Brothers also revealed a few of their other future plans – including celebrating Nick's upcoming 16th birthday on the studio lot in Los Angeles where they will soon start filming their new Disney show, J.O.N.A.S.
FNMTV host Pete Wentz also announced that for the first time in the VMA's history, fans will select nominees and the vote for the winners in eight categories.
The first two categories open to votes are best male video and best female video.
Fans will select nominees for six remaining categories in the coming weeks, including video of the year, pop video, best hip-hop video, best rock video, best new artist and best dancing in a video.
The MTV Video Music Awards air live on Sunday Sept. 7 at 9 p.m from Paramount Studios in Los Angeles.