According to Southern, the brothers were so estranged that Noel’s youngest sons had never met Liam’s.
“They spent the entire tour together, becoming friends and, more importantly, family,” he explained.
“That sudden togetherness and harmony was another major factor in breaking down the barriers between Liam and Noel.”
The Cardiff concert demonstrated the reception the band could expect from both longtime and new fans as they returned to the road.
“The anticipation was overwhelming,” Southern recalled.
He noted that Noel “hadn’t anticipated… the emotional response” from the audience.
“Seeing three generations of a family in the crowd—and not just original fans from decades past—was remarkable.”
“I’ll never have another experience like that one in Cardiff. It was extraordinary.”
Directors Will Lovelace and Dylan Southern told BBC Breakfast they are seeking the fan featured in the documentary Don’t Look Back in Anger, which chronicles the Gallagher brothers’ onstage reconciliation.
Southern remarked: “That young man is remarkable—he’s had the experience of a lifetime and doesn’t know how to process it.
“We want to find him because there’s a beautiful moment of kindness where a complete stranger hugs them. We didn’t know what to expect filming these shows, but they brought out the best in people.”
He added: “What we ended up with is a music documentary that’s actually a feel-good film.
“It’s full of hope, and it’s wonderful to share that with the world right now.”
The filmmakers had 1,800 hours of raw footage, six weeks of rehearsals, and 13 shows to work with.
Oasis: Don’t Look Back In Anger is in cinemas from Wednesday 9 September.