Donald Glover gave director Ryan Coolger notes on the Black Panther script.

In a new interview with ColliderBlack Panther director Ryan Coogler was asked why Donald and Stephen Glover were thanked in the credits, and it turns out that the brothers helped with the early script.

“Donald and Stephen actually gave me notes on a draft. They came in and read — came in and took a day, they were really busy — they took a day and read the draft… this was right before we started the shoot. They had some cool insight.”

While they didn’t suggest major changes, the Glover brothers were able to expand on a key part of the movie.

“It wasn’t that kind of a thing, ‘change this, change that.’ It was more of… we were looking for ways to highlight a few more character things, specifically with Shiri when she pokes fun at her brother. Donald is one of the funniest people that I know, so he had some interesting ideas, and Stephen is crazy talented as well.”

Black Panther hits theaters this President’s Day weekend.

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