Bryan Adams Talks Working With Garry Marshall on Upcoming 'Pretty Woman' Musical

"Basically we did an audition," Adams recalls. "Jim and I wrote three songs which we thought would be appropriate for the stage and then we met with [the producers] and it was one of those classic scenarios where, 'OK, you guys need to leave the room so we can talk about you, and we'll call you, don't call us.' And then half an hour later I got a call."

Bryan Adams: 'I Don't Think About What I've Done; I Think About What I'm About To Do'

Since starting work in January, Adams and Vallance have written about 14 of the 20-22 songs that will be needed for the musical, with a December deadline for everything to be completed. None of the songs from the film's soundtrack -- which included tracks by Roxette, Go West, a new mix of David Bowie's "Fame" and Roy Orbison's "(Oh) Pretty Woman" -- are being used for the stage version. "We have these large meetings when we all sit around, 20-25 people, and they all talk about what's going to happen and Jim and I sort of skulk away and go write a song," says Adams, who's a fan of the 1990 movie that starred Julia Roberts and Richard Gere. "Obviously these things go through huge changes as you get closer to the date, so the stage is different than a band. You find areas of [the book] where music's playing and there's dialogue and you have to segue back into the song, so there's a lot of arrangements that goes on -- a lot more production and arrangement that goes into a musical than there is in making an album. It's super fun."

Adams will be mixing work on Pretty Woman with live performances. He has shows booked in North America and Europe through Oct. 11, continuing to promote Get Up, his 2015 Jeff Lynne-produced album.