Never an act to shy from an artistic challenge, U.K. pop duo Pet Shop Boys is to make the leap into dance theatre with its first ever full-length ballet score.

Working in partnership with renowned London dance theatre Sadler's Wells, the BRIT Award-winning act has composed an original score for "The Most Incredible Thing," a brand new ballet based on an original story by Hans Christian Andersen.

The production, which features choreography by Javier De Frutos and stars the U.K. Royal Ballet Principal, Ivan Putrov, is set to make its world premiere at Sadler's Wells in Spring 2011.

In a joint statement, the veteran group's members Neil Tennant and Chris Lowe said: "in the past we have written music for the club dance floor so to write music for the ballet stage seems like a logical development."

Sadler's Wells artistic director and chief executive Alistair Spalding noted that "new full-length dance works for today's audiences are surprisingly rare," adding: "Sadler's Wells' own productions have at their heart a desire to work outside of conventional genres, to introduce artists with a collaborative sensibility and to support the creation of new work that pushes the boundaries of dance. 'The Most Incredible Thing' absolutely embodies those aims."

Pet Shop Boys 10th studio album "Yes" was released last year on Parlophone/EMI in the United Kingdom and Astralwerks in the United States where it peaked at No. 32 on the Billboard 200. In 2009 the group was honored with the BRIT Award for Outstanding Contribution to Music.