Leonidas in February 2014
|Born||14 November 1987|
Brent, London, England
|Relatives||Stephanie Leonidas (sister)|
Georgina Leonidas (sister)
Leonidas was born in Brent, London, the son of a Greek Cypriot father and an English mother.  He also has Welsh ancestry through his mother. He has three sisters: Stephanie and Georgina, both actresses, and Helena, a teacher.
Leonidas first appeared in a film in 1997, as an extra in Charles Sturridge’s FairyTale: A True Story.  His first speaking part came in 2001 in the BBC series Grange Hill, in which he stayed for four seasons. Until 2008, he was credited mostly as Shane Leonidas.
In 2009, he co-starred in the teen horror Tormented, and in 2010 he appeared in Centurion, starring Michael Fassbender. In the following years, his works included the TV series Sinbad, a guest role in Doctor Who and the Spanish film Animals.
Leonidas had a breakthrough year in 2013: he was cast by George Clooney in his Second World War drama The Monuments Men, starring Clooney himself, Matt Damon, Bill Murray and Cate Blanchett. He also landed a role in Jon Stewart’s Rosewater. This led him to be named as one of Screen International's Stars of Tomorrow. 
In 2015, Leonidas had a brief role in the Emmy-nominated  television film Killing Jesus. He then appeared in the action film Renegades and in the comedy-horror Kill Ben Lyk. From 2017 to 2019, he was part of the cast of the series Riviera, followed by a role in the Netflix science fiction/crime-drama The One.
|1997||FairyTale: A True Story||Extra|
|2014||The Monuments Men||Sam Epstein|
|2018||Kill Ben Lyk||Roberto|
|2001–04||Grange Hill||Josh Irvine||Television debut: 23 January 2001 |
|2002||The Bill||Josh Harvey|
|2005||The Bill||Ryan Greaves|
|2007||Holby City||Jez Patterson|
|2008||Banged Up Abroad||Scott White|
|2011||Doctor Who||Howie Spragg||Episode: "The God Complex"|
|2010||Through a Glass Darkly||Max|
- Day, Elizabeth; Lamont, Tom (5 January 2014). "Rising stars of 2014 – film: Dimitri Leonidas". The Guardian.
- Edelstein, David (11 November 2014). "Jon Stewart's Rosewater Is Dramatic in a Way That's Rare in Political Filmmaking". Vulture.
- "Dimitri Leonidas - "Monuments Men" - intervista a Occupy Deejay". Occupy Deejay. 11 February 2014 – via YouTube.
- "Dimitri Leonidas's CV at Independent Talent Group". Retrieved 27 October 2019.
- "Screen unveils 2013 UK Stars of Tomorrow". Retrieved 27 October 2019.
- "67th Emmy Awards Nominees and Winners: Outstanding Television Movie - 2015". Retrieved 2 November 2019.
- "Grange Hill - Episode #24.1". Retrieved 10 November 2019.