Karsten recently completed production on the upcoming title Entanglement, as well as the short film On Being Twelve, for which she received the accolade of Best Young Actress at the Snow Leopard International Film Festival. Karsten also won Best Child Actress at the Sydney Indie Short Festival. Her television credits include Amazon's Hunters, alongside Al Pacino, and a starring role as the young Pam Sinclair in the documentary series Evil Lives Here. She has also written and starred in the short film Viceroy, released in 2020.

Karsten is a skilled singer, and her passions include theater and writing. She currently splits her time between New York and Los Angeles with her younger brother, her mother, a choreographer, and her father, an artistic director.