“Taking on what may be one of the most memorable performances in movie musical history...Jon Peterson shines. Don't worry, fans of the original, [Peterson's] interpretation of "Make 'Em Laugh" is every bit as funny as the original.” - Jennifer L. Saunders
— The York Independent
“Peterson's facial humor is akin to that of Don Knotts, while his fall-down comedy is reminiscent of John Belushi or John Candy, only 200 pounds lighter. Both [Amanda] Laverne and Peterson can be considered Broadway-level talent.” - Buzz Dietterle
— Daily Democrat 'Showcase'
“The rubber-faced Broadway actor Jon Peterson is brilliant as Cosmo Brown, Don Lockwood's side-kick. His acrobatic dancing is joyfully exuberant in the classic number "Make 'em Laugh", but Peterson makes it look effortless.” - Sharon Cummins
— York County COAST STAR
“Jon Peterson displays crisp comic timing as side-kick Cosmo Brown and excels in the hoofing department. Simultaneously charming and chid-like in his solo replication of Donald O'Connor's shenanigins in "Make 'em Laugh", Peterson has star quality that draws all eyes to him, even in his dance pairings with the other two.” - Nancy Grossman
— Broadway World