After appearing in the films Rachel Getting Married (2008) and The Understudy (2008), her starring role in Glass Chin (2014) earned her a nomination for the Independent Spirit Award for Best Supporting Female.

Ireland's other film roles include the acclaimed productions The Family Fang (2015), Hell or High Water (2016), Piercing (2018), The Miseducation of Cameron Post (2018), and The Irishman (2019).

[7] Ireland was featured in the 2008 stage adaptation of The Beebo Brinker Chronicles, a series of lesbian pulp fiction novels by Ann Bannon.

She has also appeared in the films The Family Fang (2015), Hell or High Water (2016), Piercing (2018), The Miseducation of Cameron Post (2018), and The Irishman (2019).

In 2012, while working on a Wooster Group production of Troilus and Cressida in London, Ireland was romantically linked to costar Scott Shepherd.

[citation needed] Ireland has narrated several audiobooks, including bestsellers by Frederik Backman, Anthony Doerr, and Amor Towles.