Billie Eilish and Finneas O’Connell pose backstage with their awards. Picture: Reuters

Billie Eilish’s brother Finneas O’Connell has revealed the pair came up with their “No Time To Die” on their tour bus.

The “bad guy” hitmaker’s sibling and producer has revealed that the Grammy-winning pair were given the “first 20 pages” of the script for the upcoming 007 movie to work with and came up with their demo whilst on tour, before heading to London to get legendary composer Hans Zimmer and Johnny Marr to record the orchestral arrangement and guitars respectively.

Finneas told the latest issue of GQ Hype: “We wrote ‘No Time to Die’ on a tour bus.

“Specifically, in the bunks of our tour bus.

“We were given the first 20 pages of the script.