Kevin Jonas is currently 20, but he turns 21 on November 5, 2008. Joe Jonas is currently 19. He turned 19 on August 15, 2008. Nick Jonas is currently 15, but he turns 16 on September 16, 2008. Frankie Jonas is currently 7, but he turns 8 on September 28, 2008.
about four. they started in 2005.
Joe Jonas is the oldest of the four brothers
I believe Joe Jonas was 16 years old BELIEVE IT OR NOT
he was 18
he was 13 years old when they started the Jonas brothers.
the Jonas brothers will never be old they rox and there hotties there are 3 of them triple threat
four feathers look it up in the Jonas brothers burnin up book four feathers look it up in the Jonas brothers burnin up book
He was 14!
he was 11
He was twenty this august.
79
Jonas Brothers little Brother Name Is Frainkie and he is 9 years old