Cillian Vallely is an Irish musician, born in Armagh, Northern Ireland.

He plays traditional Irish music on the uilleann pipes and low whistle, and studied at the Armagh Pipers Club with his mother and father, Brian and Eithne, and then with the late Armagh piper Mark Donnelly.

He has also performed and toured with Riverdance, Natalie Merchant, Tim O'Brien & Mary Chapin-Carpenter in The Crossing, New York-based Whirligig, and the Celtic Jazz Collective with Lewis Nash and Peter Washington.

In the past couple of years, he has worked on various collaborations between traditional and classical music, along with his brother Niall and the composer Micheal O’Suilleabhain.

He has recorded on over 40 albums including Callan Bridge with his brother Niall, On Common Ground with Kevin Crawford and various guest spots with Natalie Merchant, Alan Simon’s Excalibur project with Fairport Convention and Moody Blues, GAIA with the Prague Philharmonic Orchestra, and singer Karan Casey.