Celtic Thunder is a Celtic music group, composed of five Celtic male soloists who perform both solo and ensemble numbers. Celtic Thunder debuted in August 2007 at the Dublin City University in Dublin, Ireland.

Since the group's formation, Celtic Thunder has released two albums: Celtic Thunder and Act Two and a live performance DVD entitled Celtic Thunder: The Show, with a new album titled Take Me Home to be released on July 14, 2009.

 Celtic Thunder is known for its eclectic style with songs ranging from a soloist to an ensemble focus. The group is backed by the Celtic Concert Orchestra, and their live shows are known for the use of dramatic effects via lighting and choreography as well as a stage set resembling an ancient stone pathway suggestive of those referenced in Celtic lore.

In March 2009, Celtic Thunder opened the Saint Patrick's Day Parade in New York City, and later that day performed for President Obama, Mrs. Obama and Taoiseach Brian Cowen (or Irish Prime Minister) at the White House.