Born in Poland and raised in Western Australia, Kasia studied acting at the VCA before moving to New York to study Meisner at the William Esper Studio.

Most recently, she played Elizabeth in Big Heart (Theatre Works) for the 2017 Melbourne Fringe Festival.

Previous theatre credits include We Get it (MTC Neon); NSFW (Red Stitch); You took the Stars (Melbourne Fringe); This is What it Feels Like (La Mama); The Joy of Text (La Mama); The Cherry Orchard (Winterfall); The Seagull (VCA); The Taming of the Shrew (VCA); A Season at Sarsaparilla (VCA); Speed the Plow (HST); Serenade (Melbourne International Comedy Festival); and Fatherland, a creative development for Tom Holloway in collaboration with Company B Belvoir.

Kasia has worked in television on The Warriors, City Homicide, Rush, The Dr Blake Mysteries, Mystery of a Hanson Cab, Jack Irish: Bad Debts, Wentworth and Hunters, for the SyFy Network.

She made her feature debut in The Moon and the Sun for Paramount Studios.

In 2010, Kasia devised and directed Bring A Nice Dress, a show about brothel workers, for the Perth Artrage Festival, and assisted Brendan Cowell on the direction of Ruben Guthrie at Red Stitch.