Caoilinn Springall is an Irish child actress. Her films include The Midnight Sky (2020) and The Beast Within (2024). On television, she is known for her role in the Amazon Prime series Citadel (2023). 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.