Idrissa Akuna Elba ( IH-driss; born 6 September 1972) is an English actor, rapper, singer, and DJ. An alumnus of the National Youth Music Theatre in London, he is known for roles including Stringer Bell in the HBO series The Wire (2002–2004), DCI John Luther in the BBC One series Luther (2010–2019), and Nelson Mandela in the biographical film Mandela: Long Walk to Freedom (2013). For Luther, he received four nominations each for a Golden Globe Award for Best Actor and a Primetime Emmy Award for Outstanding Lead Actor, winning one of the former.

Elba appeared in American Gangster (2007), Obsessed (2009) and Prometheus (2012). He portrayed Heimdall in the Marvel Cinematic Universe (MCU), beginning with Thor (2011), and Bloodsport in The Suicide Squad (2021), set in the DC Extended Universe. He also starred in Pacific Rim (2013), Beasts of No Nation (2015), for which he received Golden Globe and BAFTA nominations for Best Supporting Actor, and Molly's Game (2017). One of his other prominent roles was that of Rufus Buck in the Western film The Harder They Fall (2021). Elba has also voiced characters in Zootopia, The Jungle Book, Finding Dory (all 2016) and Sonic the Hedgehog 2 (2022). He made his directorial debut with Yardie (2018).

In 2016, Elba was named in the Time 100 list of the Most Influential People in the World. As of May 2019, his films have grossed over $9.8 billion at the global box office, including over $3.6 billion in North America, where he is one of the top 20 highest-grossing actors. Apart from acting, Elba performs as a DJ under the moniker DJ Big Driis or Idris and as an R&B singer.