When you sing for your supper, it's hard to keep weight on, says Teddy Tahu Rhodes, who takes a star turn as the bullfighter, Escamillo, in the Metropolitan Opera's production of Bizet's "Carmen" starting Saturday in New York.

WSJ: Opera Singer Builds Up Stamina for 'Carmen'

He has been in many productions in Australia, Europe and the U.S. He has sung Escamillo in "Carmen" before, most notably in 2010, when he was called to fill in for a singer three hours before a global broadcast of a Metropolitan Opera performance.

WSJ: Opera Singer Builds Up Stamina for 'Carmen'