She has appeared as a series regular on Raw (2008), Hell on Wheels (2011–2012), The Astronaut Wives Club (2015), House of Cards (2016–2017), and The Last Tycoon (2016), playing Maggie Shaw / Queen Maeve in The Boys (2019–2022) and The Boys Presents: Diabolical (2022).

McElligott grew up in Dublin and began acting during secondary school.

[1][2][3] She starred in Moon (2009) and the RTÉ television series Raw before leaving to film Leap Year (2010).

From 2011 to 2012, she played a lead role in the AMC series Hell on Wheels.

[6] In 2016, McElligott played Hannah Conway, wife of the Republican presidential nominee, in the fourth and fifth season of the Netflix show House of Cards.