Country music is going international with the C2C: Country to Country, the first-ever two day country music extravaganza to be held at London's historic O2 Arena. Tim McGraw and Carrie Underwood have been announced as the headlining acts for the superstar-heavy event, which is set to take place on March 16 and 17, 2013.

"Our trip to the UK and playing the O2 is one of the things I'm looking forward to the most for next year," McGraw says of his pending trip across the pond (quote via StereoBoard.com) "I love being able to take my music to other countries, and I think there are a lot of new songs on 'Two Lanes of Freedom' that fans over there will really dig. It's going to be a blast!"

Underwood is returning to the United Kingdom for the second time in less than a year in promotion of her latest platinum-selling album, 'Blown Away.' The 'Two Black Cadillacs' singer sold out London's prestigious Royal Albert Hall in an incredible 90 minutes.

Also slated to appear during the C2C: Country to Country festival are Little Big Town, Vince Gill, Brantley Gilbert, LeAnn Rimes and Darius Rucker. Sugarland's Krisian Bush is also scheduled to perform in his first major music appearance without his duo partner by his side. Jennifer Nettles welcomed a baby boy, named Magnus, on December 6, 2012.

More performers for London's Country to Country Festival are expected to be announced in the coming weeks.

Country to Country Music Festival Lineup:

Saturday, March 16, 2013:
Tim McGraw
Vince Gill
Little Big Town
Kristian Bush

Sunday, March 17, 2013:
Carrie Underwood
Darius Rucker
LeAnn Rimes
Brantley Gilbert