Sinead Matthews (born c. 1980) is an English actress whose credits include film, television, radio and stage.
As well as having extensive theatre experience, her screen credits include He Knew He Was Right (2004), Vera Drake (2004), Pride & Prejudice (2005), Ideal (2005–2010), Terry Pratchett's Hogfather (2006), Nanny McPhee and the Big Bang (2010), Black Mirror (2013), The Smoke (2014), Jellyfish (2018), The Crown (2019), and Hullraisers (2022).
[5] In 2013, she played a lead role in series one of Black Mirror, as Sarah in the episode "Be Right Back", with Domhnall Gleeson and Hayley Atwell.
[4] In August 2016, Matthews played Hermia/Fairy/Mistress Quince in A Midsummer Night's Dream, composed by Felix Mendelssohn, at The Proms.
[6] In 2019 she played Marcia Williams, political secretary to Prime Minister Harold Wilson, in season three of the TV series about the royal family, The Crown.