Springall made her feature film debut in the 2020
Netflix science-fiction drama,
The Midnight Sky, directed by
George Clooney. In the film, she played the role of Iris, a mysterious young girl who forms a bond with Clooney's character, Augustine Lofthouse. Her performance was widely praised for its emotional depth and maturity, especially considering her young age. Following this, Springall secured a main role in the television series
Citadel, and a recurring role as Little Girl in the British psychological horror film
Stopmotion. She starred in
Paul W. S. Anderson's fantasy-adventure film
In the Lost Lands, alongside
Dave Bautista and
Deirdre Mullins, which was released in 2025. Springall appeared in the 2024
Doctor Who episode "
Boom", playing Splice Alison Vater. In May 2023, it was announced that Caoilinn Springall had joined the cast of
The Beast Within. == Filmography ==