
Siobhán McSweeney
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Siobhán McSweeney (born 27 December 1979) is an Irish actress and presenter. She is best known for her role as Sister Michael in Derry Girls. McSweeney was born in County Cork, Ireland where she grew up in Aherla. Before acting, she earned a science degree at the University College Cork. In 2001, she moved to London when she secured a place at the Central School of Speech and Drama.
Known for
Credits

Alice Through the Looking Glass (2016)
as Witzender

The Wind That Shakes the Barley (2006)
as Julia (uncredited)

Nowhere Special (2020)
as Pam

The Electrical Life of Louis Wain (2021)
as Dr Cooke

Madfabulous (2026)
as Blanche

Extra Ordinary (2019)
as Boring Noreen

National Theatre Live: The Playboy of the Western World (2026)
as Widow Quin

Anthony (2020)
as Luighsearch Kelly

The Widow (2020)
as Eileen

Brian Friel: Shy Man, Showman (2022)
as Self

Scrubber (2020)
as Scrubber

Happy Days (2021)
as Winnie

Spud (2024)
as Spud





