LONDON — British soprano Sarah Brightman is aiming to perform where no professional singer has ever gone before: the International Space Station.

The 54-year-old said last week she is working with composer Andrew Lloyd Webber, her ex-husband, to create a song she will sing in space after she blasts off Sept. 1 in a Russian Soyuz rocket.

Brightman, known to many for her role years ago in the musical “The Phantom of the Opera” and for a duet with tenor Andrea Bocelli, told reporters she felt “overwhelmed” and excited – but not yet nervous.

“I would like to sing something from space,” she said. “We’re trying to work out all the technical details, obviously it’s quite a complex thing to do.”

She said she and Lloyd Webber are working to find a song that “suits the idea of space” while scientists iron out how to make the performance work, possibly with a choir on Earth.

“I’m trying to find a piece which is beautiful and simple in its message, as well as not too complicated to sing,” she said.

Brightman would not disclose the cost of the trip – reportedly $52.8 million – but maintained she is paying for it herself. She played the original lead in “Phantom” and was an original cast member in “Cats.”

On the journey, arranged by the private space company Space Adventures, the singer will be part of a three-person team and spend 10 days aboard the space station.

Brightman said she has wanted to go into space since she watched the 1969 moon landing as a 9-year-old.