Diana Damrau has canceled all performances of Gounod’s “Faust.”

The Royal Opera House has announced that due to a slipped disc Damrau has had to withdraw from singing the role of Marguerite on April 11, 15, 18, 25, and 30. As a result, Russian soprano Irina Lungu, who is scheduled to sing Marguerite on May 3 and 6 May, will takeover all performances.

Lungu made her Royal Opera debut in 2014 as Musetta in “La Bohème and has sung all over the world including the Deutsche Oper Berlin, Opéra de Paris, Hamburg State Opera, Teatro alla Scala, Opernhaus Zürich, and the Vienna State Opera.

Lungu joins a cast that includes Michael Fabiano in the title role, Erwin Schrott as Méphistophélès, Stéphane Degout as Valentin, and Marta Fontanals-Simmons as Siébel. Dan Ettinger conducts all performances.

Damrau returns to the stage in May for a series for recitals.