The group will be joining Blue, A1, Damage, 911, 5ive and 5th Story for the 13-date arena tour and they can't wait to be back on stage.
3T, who are nephews of the late Michael Jackson, can't wait to catch up with the bands from series one and two. Taryll tells Reveal: "It's almost like a high school reunion, only we didn't go to school with these bands!"
3T tell us that rehearsals are "going good" and they say they're most looking forward to performing their 1996 hit 'Anything'. "It means so much to us because it was our first single and it was an introduction to the world," says Taryll.
While the trio can't wait to get back on stage, TJ tells us that he's most looking forward to spending time with his brothers.
"Back home, my life is so crazy and hectic that I don't get as much downtime with my brothers," says TJ. "This is a good opportunity for us to be back and be on stage having fun together. Being on the tour bus will help with that as well."
So what's next after the tour?
"We've been working on the album and we're more than half way through with it," explains Taryll. "It'll be ready by 2015 and then we'll do another tour. Our style has grown. It'll be more organic and more live instrumentation."
Tickets for 'The Big Reunion Boy Band Tour' are now on sale via www.livenation.co.uk, www.ticketmaster.co.uk. Meet and greet packages from www.vipnation.eu. For tour details visit itv.com/bigreunion.
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Watch 3T's video for 'Anything' below: