He was born in Ostfildern, Germany. He is the son of Alevi-Zaza immigrants from Tunceli, who returned to Turkey when he was two. When Fırat was 9, his family emigrated to France. The Çelik family settled in the suburbs of Champigny-sur-Marne. At 19 he started being male model and make advertising in such activity.

He took drama classes supported by its close. Fırat at that time was not quite sure what career to choose, but that changed when he met director Thierry Harcourt. Harcourt, believed in the capabilities of Çelik and decided to train as an actor.