The Celts (Welsh: Y Celtiaid[2]) is a 2000 television documentary series produced by Opus Television for the Welsh channel S4C.

[3] A book adaptation of the same name by John Davies was published in the same year by Cassell & Co.[4] Also in that year, the programme was sold to the American cable network Celtic Vision.

[5] The series examines who the Celts were, where they came from and what made their culture distinctive from other European peoples; with dramatizations of major historical events and visits to modern Celtic lands.

A number of archaeologists and scholars of Celtic studies are featured in the documentary, such as Jörg Biel [de], Peter Connolly, Barry Cunliffe, Markus Egg [de], Michel Egloff, John T. Koch, Barry Raftery, Colin Renfrew, Peter Reynolds, Thomas Stöllner [de], Bryan Sykes, among others.

The series has been released on DVD by Kultur International Films in 2010.