His grandfather from his father's side emigrated from Ireland to work in the capital as a mechanic and a singer on the Irish Dance-Hall Circuit.
[6] Subsequently, he was invited to work in the Stateside production of the play that was staged on Broadway's Bernard B. Jacobs Theatre.
[7][8] The same year, he was cast as Kenny Stowton, an ex-hacker recruited by MI6, in BBC's hit black comedy-spy thriller TV series Killing Eve.
His "quirky, fan-favorite" character[9] started off as a temporary one but turned into a "re-occurring and quite integral" part of the hit show.
"[12] In 2022, Delaney started working in the Charlie Stratton-directed film Seacole, along with Sam Worthington, Gugu Mbatha-Raw, and Rupert Graves.