Rosie is a passionate, highly skilled and approachable voice educator with over 20 years of experience helping people unlock the full potential of their spoken and sung voice. With a deep understanding of vocal anatomy and physiology, and a love of seeing her clients thrive, Rosie combines expertise with warmth to help clients achieve real, lasting results.
Rosie is known for making even the most complex vocal concepts feel clear, practical, and achievable and for her ability to pinpoint a technical solution to a vocal challenge. Her clients value her ability to communicate with precision and empathy, empowering them to build healthy, sustainable technique and confidence in their own artistry.
Having performed professionally in opera, musical theatre, cabaret, contemporary music, and theatre, Rosie understands the pressures and expectations of the performing arts world first-hand. She has become a trusted teacher for performers in major touring productions including Wicked, Miss Saigon, Beauty and the Beast, Mamma Mia, Cinderella, Aladdin, Billy Elliot, Come From Away, and Chicago, and has coached and consulted for companies including State Theatre Company South Australia, Windmill Theatre Company, GWB Entertainment, and State Opera South Australia. Rosie’s also proud to work as Vocal Coach for the Class of Cabaret program at the Adelaide Cabaret Festival.
As a Certified Estill Master Trainer, Rosie assists mentor Naomi Eyers in Level 1 and 2 Estill courses and continues to learn from leading voice experts around the world. She’s also a certified Vocal Health First Aider and works alongside speech pathologists, ENTs, manual therapists, and psychotherapists to support her students holistically. Rosie is committed to ongoing professional development with her most recent achievement being the acquisition of a lifetime membership with the Chris Johnson’s Teacher Program, Evolve.
Rosie works with professional performers in cabaret, musical theatre, opera, contemporary commercial music, choral and jazz, as well as actors, teachers, and public speakers. She lectures in Vocal Anatomy & Physiology and provides one-on-one tuition to Bachelor of Musical Theatre students at the Elder Conservatorium of Music, Adelaide University.
Above all, Rosie brings a wealth of experience, insight, and care to every session — creating a supportive, inspiring space where students can take risks, solve problems, and discover their full vocal capabilities.
Rosie is also an award-winning performer with over 25 years of experience in musical theatre, opera, cabaret, and corporate entertainment across Australia and internationally.
Her credits include The Phantom of the Opera (Cameron Mackintosh), Candide as the Baroness (2024, State Theatre Company South Australia & State Opera South Australia), Love Burns (2022, National Tour, State Opera South Australia), Carousel (2021), Die Fledermaus as Prince Orlovsky (2017, State Opera South Australia), and The Magic Flute as Second Lady (2016, State Opera South Australia). Other highlights include South Pacific as Dinah (Seabiscuit Productions), The Front as Miriam (2015, world premiere, Adelaide Cabaret Festival), and most recently Primetime as Gloria (2025, Adelaide Cabaret Festival).
She won the 2012 Adelaide Theatre Guide Curtain Call Award for Best Professional Female Performance as Diana Goodman in Next to Normal.
A sought-after corporate and concert performer, Rosie has entertained audiences of over 25,000 at events like the Big Bash League’s New Year’s Eve celebrations at Adelaide Oval. She has performed with State Theatre Company South Australia, State Opera South Australia, Adelaide Festival, Seabiscuit Productions, and Ding! Productions.
Rosanne Hosking was a powerhouse. Her strong vocalisation and profound connection to her character made her illness absolutely believable and heart wrenchingly painful. Hosking had the perfect rock sound and her voice sat sweetly in the lyric.
The Barefoot Review
As wonderful as these characters are, the night belongs to Rosanne Hosking’s brilliant portrayal of Prince Orlovsky. She is riveting to watch and listen to whenever she appears on stage. A tribute to Conchita Wurst, she slinks and glides across the stage like a panther, the best Orlovsky this reviewer has seen.
Stage Whispers
Rosanne Hosking takes the central role of Diana and makes it her own, in a superbly realistic and committed characterisation. It is not merely her acting and physicality that convey everything that her character is experiencing. Hosking goes well beyond that...this is a magnificent performance.
GlamAdelaide