Federer can be heard on the Wicked cast recording .
Federer , who was the longest - running original principal cast member , left the production on January 8 , 2006 , and was succeeded by understudy Cristy Candler .
cast member can be heard on the Wicked cast recording .
Federer , who was the longest - running original principal cast member , left the production on January 8 , 2006 , and was succeeded by understudy Cristy Candler .