Luke Combs, Darius Rucker and Eric Church are all confirmed to fill the same headline roles next year.
The festival will again take place in London, Glasgow and Dublin on 13-15 March near year, and in the two cities in which it debuted this year, Amsterdam and Berlin.
Lyle Lovett, Drake White and Ashley McBryde were among his fellow attractions on C2C's closing London bill.
Other attractions on the main stages at the London event included Carly Pearce, Catherine McGrath and Fairground Saints.
The first day of the multi-city festival's showpiece London event also featured an outstanding performance by Cam and many other highlights.
Kylie Olsson presents highlights from CTC 2016 & interviews Ashley Campbell, Thomas Rhett, A Thousand Horses, Maddie & Tae at the Big Machine Label hangout!