Kelly Krantz received her bachelor's and master's degrees from UCLA, where she was seen as Brambilla in La Périchole and numerous roles in L'Enfant et les Sortilèges.
In 2004, she performed the role of Mrs. Herring in Albert Herring. In 2005 she was the alto soloist in Beethoven's Missa Solemnis with the Redlands Symphony and the alto soloist in Beethoven's Ninth Symphony with the Topeka Symphony. She has performed with the LA Opera Chorus since 2002.