Soprano Hilary Koolhoven has delighted audiences from the United States to Europe with her warm voice and dramatic acting skills. With experience in opera, musical theatre, and recital repertoire, she has showed excellence in a wide range of roles: from the flexibility of singing required from the title character of "La Cenerentola," to achieving the multi-layered and comedic personality of Margaret in "The Light in the Piazza." 

Hilary graduated from the University of Utah with a Master of Music degree and received her Bachelor of Arts from Westminster College in Salt Lake City. Along with performing in university settings, she has worked with organizations such as Utah Opera, Ohio Light Opera, and the Franco-American Vocal Academy. 

Her powerful voice is magnificent and showcased beautifully in this role.
— Wooster Weekly News, in a review of "H.M.S. Pinafore"
It’s easy to forget that amid the madcap comedy, there is some truly beautiful music in ‘Pinafore’ and the whole cast does it justice, most obviously Koolhoven, whose solos...showcase a crystalline soprano.
— The Daily Record
Speaking of ‘Pinafore’, there was good vocalizing from Krumreig and Hilary Koolhoven in the double cast roles of Ralph Rackstraw and Josephine, the latter coping with Josephine’s high-lying pieces with aplomb.
— Forbes on Film & Footlights
OLO newcomer Hilary Koolhoven shines as Pauline, matching [Ted] Christopher word for word and note for note in “The Ladder of Love is Tremendously High”, singing brightly and beautifully while navigating some really, really funny physical comedy.
— The Daily Record Review of "La Vie Parisienne"
Among the leads, Christy Lee Peterson as Clara and Hilary Koolhoven as Margaret, Clara’s mother, really stood out. They are exceptional singers as well as actors. They portrayed their characters convincingly and brought depth and dimension to their roles.
— Reichel Arts Review of "The Light in the Piazza"