Kelly Agathos | Artistic Director

Kelly first discovered improvisation in 2010 and instantly fell in love with the art form. Soon after, she made her mark on Brussels’ fledgling anglophone improv scene by starting ATC Improv in 2012 and The Ghost Sheep in 2013, with whom she taught and performed for 5 years. In 2017, Kelly founded ImproBubble to deepen, broaden and professionalise the range of improv opportunities in Brussels, aiming to give future students all the tools they need to become a truly well rounded improviser. She has also been combining her past experience as an EU affairs professional with improvisation to facilitate corporate trainings, teambuildings and company events. 

Aside from running ImproBubble, Kelly teaches, directs and performs throughout Europe both in improv festivals and as an invited guest. Between 2020-2024, Kelly was the curator and producer of all anglophone shows at the Improviste theatre. She is also the co-founder and host of The Schuman Show, a comedy show mixing improv, stand up and sketch focused on EU politics.

Rozana Radu | Teacher

Rozana is a mother, an actress and an improviser. She started improvisation 15 years ago in Bucharest creating Improvisneyland, the longest-serving impro group in Romania, alongside 6 other actors. They were the first Romanian improvisers to ever perform at the Second City and Impro Amsterdam.

She has done theatre, cinema, television, ballet, aerobics, fencing, ballroom dancing, and she would love to learn capoeira. She also improvises in French in Rouge, a socially engaged show that tackle gender inequalities. Aside from improv, she is a member of U-Thrive, an NGO specialised in alternative education for children, teenagers and disadvanteged communites.

She always says that travelling with her family are among her most enriching and therapeutic moments.

Vincent Van Niewenhuyze | Teacher

Hailing from the charming city of Ghent, Vincent is a seasoned improv player, teacher, and coach with over 15 years of experience bringing scenes to life.

By day, he is a project and process facilitator, tackling the corporate world with the same creative flair he brings to the stage. But when the clock strikes geek o’clock, this neurospicy dynamo dives into his other true passions: gaming (mostly MMORPGs), rolling the dice in Dungeons & Dragons, and embracing full-on otaku status with an ever-growing anime watchlist.

On stage, he is all about creating magic through intimacy, warmth, and boundless energy, making every scene feel fresh and fun. Offstage, he’s just as passionate about helping others unlock their creativity, keeping the fun in fundamentals, and exploring themes of gender and queerness in performance.

Whether he’s teaching, rocking an improv stage, leading a dungeon crawl, or leveling up his character online, Vincent’s motto is simple: “You be you!”

Glenn Valentin | Comms & Social Media

Glenn is a creative jack of all trades, born and raised in West-Flanders. After a short-lived career as a physiotherapist, Glenn added a variety of job titles to his Curriculum Vitae, amongst them "book author", "SoMe manager of a life coach", and "Marketing Manager for a fashion company". 

Glenn started improv in 2023, shortly after moving to the capital. He immediately caught the bug, and completed ImproBubble's 3 steps and a first bubble. Today, Glenn has joined the ImproBubble team behind the scenes- leading our social media and comms outreach.

Non-professionally, Glenn's brain is a bottomless bucket full of creative (and sometimes weird) ideas, as shows his track record of climbing a mountain on a spacehopper, becoming a Belgian Champion hobbyhorse riding, and organising unique events for singles in Brussels.