Katie Sapper 

As Sophie, the exquisite Katie Sapper takes what could in less stellar hands be a throw-away part and makes her Mamma Mia’s heart and soul...

Steven Stanley, Stage Scene LA

Paired with Moonlight veteran Sapper, the mother-daughter duo are vocally compatible and their love for one another appears real, especially when Donna helps Sophie get dressed for the wedding and they reminisce (“Slipping Through My Fingers”). Both have several opportunities to shine during solos, duets and group numbers.

Elizabeth Marie Himchak, San Diego Union Tribune

Moonlight returnee Katie Sapper steps up wonderfully into the central role of Sophie, the 20-year-old daughter of the island innkeeper, Donna (Bets Malone); she brings soaring vocals even to such B-list ABBA tunes as “Thank You For the Music,” and her buoyant, appealing presence helps lend the story at least some sense of consequence.

Jim Hebert, San Diego Union Tribune

Katie Sapper as Anne brings beautiful singing and a lot of laughs as his young bride.

E.H. Reiter, Broadway World

18-year-old Anne, played by the powerhouse singer Katie Sapper with a rich sense of the self-consciously proper.

Jim Hebert, San Diego Union Tribune

Katie Sapper, who’s so in-demand around town these days that it can seem as if she’s in three shows at once, is also a treat as Denise’s twin, June, the family’s sign-language accompanist and coconut-shell percussion specialist.

(It’s ironic, though, that Sapper portrays the non-singing Sanders sibling; as she has demonstrated recently in shows from Moonlight’s “Sunset Boulevard” to Cygnet’s “Bad Jews,” the lady can sing her face off.)

Jim Hebert, San Diego Union Tribune

And yet Melody, in her own way, gives as good as she gets, and Sapper — who lends this would-be opera singer a winning mix of sweetness and savvy — has a real gift for sly wit (even if some of what her character puts up with can test credulity).

James Hebert, San Diego Union Tribune

Sapper, in what is the play’s trickiest role, is marvelously dualistic, unpredictable and vivid.

David C. Nichols, Los Angeles Times

And the moment Katie Sapper steps onstage as the aspiring young actress Crystal, “Kingdom City” takes on a jolt of off-kilter energy... Crystal is an outrageously blunt force of nature who swears like a longshoreman, calls her town a “cesspool” and dreams of playing the title role in Strindberg’s steamy “Miss Julie” (which she insists is just like high school).

Sapper’s blazing, fully committed performance is not one you’ll forget soon, even if her dialogue goes over the top at times. 

James Hebert, San Diego Union Tribune

And Katie Sapper, who’s been an arresting presence on local stages lately (she had a blazing turn in La Jolla Playhouse’s recent “Kingdom City”), brings some needed humanity as Alais, Henry’s young mistress (and Phillip’s sister) who resists being a pawn to the family machinations.

James Hebert, San Diego Union Tribune

The big surprise is Katie Sapper’s Alais, beautiful as described, and much more forceful, less innocuous and victimized.

Pat Launer, Times of San Diego