"Dani welcome to the family, we can't wait to have you join us on the road!" Nick and Joe said on their twitter page, according to The Sun.
Kevin invited both Joe and Nick to be his Best Men at his wedding when he marries Danielle Deleasa.

Jonas Brothers at Teen Choice Awards August 2009. Photo: AP/Chris Pizzello
Ironically, the Jonas Brothers are wedding crashers at their relatives' or friends' weddings since of their extreme celebrity status. They sent in apology gifts to the groom and bride, since fans interrupted the wedding ceremony by banging on windows, etc.
According to their website, the brothers are headed to be in Europe during the entire month of November, playing music for fans in Italy, Switzerland, Spain, London, Paris, Ireland and the Netherlands.

Eiffel Tower in Paris. Photo: AP/Christophe Ena
The brothers talk about marriage when they're free like being unable to sleep at night due to time zone differences while on tour, according to aceshowbiz.com.