The industry

Stagebox Memberships

Home to the stars of today and tomorrow



Stagebox provides award-winning intensive training and industry acceleration in musical theatre and acting for 8-18 year olds. Our memberships are designed for exceptional performers training or working within the professional sector. Our members benefit from unrivalled access, working with creative teams at the cutting edge of the professional industry. Our professional productions and access to Stagebox Management provides members with a world-class platform for professional career development whilst building confidence, skills and friends for life.

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Stagebox Management

We nurture and build lead talent for professional film, television, theatre and musical theatre projects. Managers are assigned at every stage of the client journey from emerging to established artists.

Our Team

Meet the team behind the talent

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Emily & LJ


Emily & LJ Keston founded Stagebox with a mission to bring access, exceptional training and opportunity to the professional sector for children nationwide regardless of background, location and experience. As proud founders they continue to mentor, inspire and lead on production based projects throughout the year.

They are experts in the children’s sector and work as leading children’s casting directors and children’s general managers in the professional sector of the industry.

Keston and Keston’s are Children’s Casting Directors & Children’s General Managers. Their credits include: Oliver! (Leeds Playhouse), Charlie and the Chocolate Factory (Leeds Playhouse), Charlie and the Chocolate Factory (UK Tour), Peter Pan (The London Palladium), Disney’s Winnie the Pooh: The New Musical Stage Adaptation (London UK Premiere & UK Tour), Bonnie and Clyde (West End), The Grinch (NBC Live/Universal), How The Grinch Stole Christmas (UK Premiere and UK Tour), 300+ children for Nativity! The Musical (UK Tour and Birmingham Rep 2019-2023), Jack and the Beanstalk (London Palladium), A Christmas Carol (West End), Mame (Hope Mill/UK Tour); Rags (Hope Mill, Park Theatre & London Cast Recording) & A Little Princess (UK Premiere).

Additional children’s casting for Secret Invasion (Marvel), EPK for Room (Broadway), Christmas on Mistletoe Farm (Netflix), Amazon, Nickelodeon and major brand campaigns.


Kirsti is a Director of Stagebox and she continues in her role as Head Agent of Stagebox Management. Kirsti studied at Stanford University in America and she has a decade of experience in casting and production. She continues to lead our US style representation and genuine career development for Stagebox clients.

Kirsti leads the department in securing major leading roles in West End, Television and Film productions worldwide. Kirsti has negotiated co-representation deals with the US including The Gersh Agency and Paradigm. Stagebox Management clients have had major success securing roles in BAFTA award winning, Emmy nominated, Stage Debut nominated and Olivier award winning productions.

Stagebox Management are well regarded as the leading children’s management in the UK for lead role success with recent success including roles in the Wicked Movie, Barbie Movie, Disney’s Snow White, 3 Body Problem for Netflix, Matilda Movie, Avenue 5, The Power, The Crown, Secret Invasion, Peaky Blinders, Sex Education, Ted Lasso and every major West End musical and UK Tour. The Management works in tandem with training to ensure reputation and standards of industry excellence for career longevity and growth.


Jasmine is a Director of Stagebox and she continues in her role as General Manager at Stagebox. Jasmine leads the team in delivering our award winning Stagebox memberships.

Jasmine has a decade of experience in facilitating world class training to children age 5 to Graduate level and working closely with creative teams, parents and children to deliver industry excellence. Jasmine manages our live performance opportunities having overseen hundreds of concerts, events & live performances including: Schwartz at 75 (West End), West End Does series at Cadogan Hall, WhatsonStage Awards & The Company Project Live. Jasmine also founded The Diversity Project initative at Stagebox and has been responsible for inspiring diversity and inclusion across the Company.

Jasmine leads across our training centres of excellence, alongside creatives and with children worldwide to help them achieve their dreams.

Joe Ramson


Joe is Director of Film at Stagebox. Joe works as a Director and Producer in the professional film sector and his crews work with Stagebox to bring professional film set experiences to our members. Joe directs the company’s video shoots and works on the Stagebox Video Project and Company Project Live each year. Stagebox has 20 million+ viewers and counting and continues to lead the child sector. Joe is currently working on Sunset Boulevard, (Broadway) & Romeo & Juliet (West End) and his work is critically acclaimed in the industry.

Joe has worked professionally as a Director and Cinematographer. Credits include: Video Design and Cinematography for Sunset Boulevard (West End) starring Nicole Scherzinger. A Doll’s House (Broadway), Betrayal (Broadway), Cabaret (West End), McQueen (West End), Shark is Broken (West End), Punch drunk (London), Rambert (London), 42nd Street (UK Tour), Sound of Music (Chichester), Assassins (Chichester), Pretty Women (West End & UK Tour), Parade (Broadway), & Juliet (West End and Australia), Funny Girl (Broadway), New York, New York (Broadway), Mamma Mia (Australia), A Beautiful Noise (Broadway). Commercial credits include: Disney, Discovery, ITV, BBC, Puma, Amazon, Tesla, Manchester City, Wagamama, Pokemon, Sony, Play station, Nintendo, Lego, England FA, Google, Nickelodeon, Tiffany and Co, Wimbledon, Bentley, Ferrari, Manchester United and Cadbury’s

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