Mathilde was raised in a multicultural environment, surrounded by her Russian grandfather, German grandmother, and Belgian parents. While growing up in the small city of Liège (Belgium), she took dancing classes for over a decade, trained in improvisation, and performed in various plays throughout the years, coached by professional comedians.  
Two months after graduating from high school, she took a leap of faith and made her way to New York City to pursue her dreams. 
She first studied Meisner at The Acting Studio under James Price, then completed a "One Year Acting for Film Conservatory" program at The New York Film Academy, and finally graduated with a "Two Year Acting Conservatory" diploma from The Lee Strasberg Theatre & Film Institute. 
Since 2018, she's been portraying Amity in the J.J. Abrams & Stephen King series Castle Rock, now available on multiple streaming platforms across the globe, such as Hulu, Apple Tv, and Amazon Prime.
She’s been called "absolutely hypnotic" by John Saavedra of Den of Geek!, "magnetic"  by Cheryl Eddy of Io9, and "fearless" by Darek Thomas of Monday Morning Critic Podcast, just to name a few.
Mathilde also finds much joy and inspiration in her writing.
She won The Strasberg Works Award for a full length play she wrote which was tapped for production Off-Broadway, directed by Renoly Santiago (Hackers, Con Air, Daylight). She then wrote, produced, and played the lead in a short film which ended up at The Cannes Short Film Corner as well as at The Palm Springs International ShortFest.

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