Background
He is the son of a Greek father and a Welsh mother and speaks Welsh and English.
He is the son of a Greek father and a Welsh mother and speaks Welsh and English.
Vlahos is from Llantrisant in Wales. He trained in acting at the Royal Welsh College of Music & Drama in Cardiff, graduating in 2009. He first appeared in the British Broadcasting Corporation Wales drama, Crash, in 2009 portraying Dylan.
The following year, he appeared in the daytime medical soap opera Doctors in a week-long storyline entitled Master Of The Universe, in which he played the lead role of Lewis Cutler.
Also in 2010, he appeared in both Pen Talar and The Indian Doctor, and the film Bright Lights. In 2012, he earned the role of Private Keenan in Privates, a mini-television series about conscripts in the National Service set in the 1960s, for which he shaved his hair.
He also played the part of Mordred in series five of Merlin, a role originally played by Asa Butterfield in the first two series. Since 2012, he has played the role of Dorian Gray in Big Finish Productions" audio series The Confessions Of Dorian Gray.
He has also written an audio play, HMS Surprise for their Bernice Summerfield box set New Frontiers which was released in April, 2013.
From 6 December 2013 Vlahos will appear in Fortune"s Fool at The Old Victoria Mike Poulton’s adaptation of Turgenev’s play is directed by Lucy Bailey, in a new production which stars Iain Glen and Richard McCabe. In July 2015 it was announced that he would be playing Bertie Potts in the mini audiobook series "The Diary of River Song" set in the Doctor Who universe, alongside Alex Kingston.
The series is due for release in January 2016.
In the French historical television series about life at the court of Louis XIV, Versailles, which started with a first series in November 2015, he is part of the main cast, starring as the king"s brother, Philippe I, Duke of Orléans.