Grian Chatten, the frontman of the Irish rock group Fontaines D.C., has explained why he wore a shirt representing Cwmbran Celtic at the Reading Festival.

Chatten was observed on stage sporting a green and white striped jersey during the band's headline set.

The garment belongs to Cwmbran Celtic, a semi-professional football club based in Wales.

According to the club, sales of this specific shirt nearly doubled following Chatten's appearance at the festival.

Cwmbran Celtic has collaborated with four well-known musical acts for their 2026/27 season team kits.

Revenue generated from these partnerships supports both the club and grassroots music venues across the region.

Among the groups involved are Super Furry Animals, Panic Shack, Loose Articles, and Mogwai.

Mogwai served as a sponsor on the shirt worn by Chatten during his performance.

Chatten stated that a friend of the football club worked as the monitor engineer for Fontaines D.C. at the event.

This individual assisted in securing a size 3XL jersey for the singer.