A spokesperson for the musical told Playbill.com that McCartney departed the long-running hit due to health reasons. Her understudy, Corinne Melancon, will temporarily play the role.

Liz McCartney starred on Broadway in Taboo, Les Misérables, The Phantom of the Opera and the short-lived musical Dance of the Vampires. She also spent nearly two years in the Boston production of Nunsense, and her regional credits include Paint Your Wagon, The Rocky Horror Show and Fifty Million Frenchmen.

Mamma Mia! employs the hit songs of famed pop group ABBA to tell the story of Sophie Sheridan, a young girl who hopes to discover the identity of her father. On the eve of her wedding, she brings three men from her mother's past back to the Greek island they visited over two decades ago.

Mamma Mia! features music and lyrics by Benny Andersson and Björn Ulvaeus, a book by Catherine Johnson, direction by Phyllida Lloyd and choreography by Anthony Van Laast.

Mamma Mia! is on the web at http://www.mamma mia.com.