Born in Rhodesia, Frangoulis after his three-decade long career has established himself as a critically and commercially acclaimed recording artist and vocal performer in Greece and neighbouring countries.

Discovered by Sir Cameron Mackintosh, Frangoulis has made his official theatre debut as Marius Pontmercy in Les Misérables, and later performed in The Phantom of the Opera and the rendition of Grease.

[4] In 1988, during his final year, he played Puck in A Midsummer Night's Dream, a production in collaboration with the Royal Shakespeare Company for the Arundel Festival.

Frangoulis played the lead in the James McConnel/Kit Hesketh-Harvey[5] musical Orlando,[citation needed] where he was spotted by Cameron Mackintosh who after an audition offered him the part of Marius in the West End production of Les Misérables[4] at the Palace Theatre (1988–1989) under the direction of Trevor Nunn.

[6][failed verification][citation needed] After finishing Les Misérables, Frangoulis moved to Italy where he studied with tenor Carlo Bergonzi at the Verdi Academy in Busseto, graduating six months later.

With his mentor's Marilyn Horne, suggestion and with the help of the Onassis Scholarship, he completed a three-year long program of vocal courses at the Juilliard School of Music, in New York City[6][failed verification][citation needed] as well as studying with soprano Dodi Protero.

In 1992, Frangoulis also traveled to Liverpool, where he performed in an Opera Gala celebrating the 500th anniversary of the discovery of America, hosted by Sir Peter Ustinov.

Appearing artists for this event were as well: Montserrat Caballé, Dmitri Hvorostowski, Julia Migenes-Johnson, Dennis O'Neil, Rita Hunter and the late Alfredo Kraus, with the Royal Liverpool Philharmonic Orchestra and chorus conducted by Robin Stapleton, in the presence of His Majesty Juan Carlos of Spain and HM Queen Sophia, and HRH Prince Andrew of England.

In the summer of 1993, Frangoulis returned to the role of Marius as he starred in a touring cast of Les Misérables, at the Point Theatre in Dublin, Ireland.

[citation needed] In 1995, Frangoulis returned to London to play the role of Lun-Tha in the Rodgers and Hammerstein musical The King and I during the Covent Garden Festival.

He reprised the role of Lun-Tha in a concert version of the musical with the BBC Symphony Orchestra conducted by Wally Harper, with Barbara Cook and his 1996 return to the London cast of Les Misérables.

There he joined Athens' theatrical scene, notably through his playing Billy Kracker in Kurt Weill's Happy End with the Karolos Koun Art Theater, directed by George Lazanis, the Lead Bird in Aristophanes' comedy The Birds, directed once more by George Lazanis which was performed in almost every major ancient amphitheater of Greece, such as Epidaurus, Sparta, Filippoi and many more.

In August, he sang the title role in Yannis Markopoulos' Erotokritos at the Herodes Atticus theater, and returned to the same venue, later that month for a solo recital there, to celebrate his ten years anniversary as a professional performer on stage.

[10] Frangoulis was invited by the composer Mikis Theodorakis to perform in the Machi tis kritis concert at the Kallimarmaro amphitheater in a tribute to those who lost their lives in the Battle of Crete.

In the summer of 2001 he made his debut in ancient Greek tragedy, played Dionysus in a touring production of Euripides' The Bacchae, also performed at the Herodes Atticus Theater, in Athens.

[citation needed] With the Moscow New Opera soloists, chorus and orchestra, he made a hugely successful tour of different cities in Russia and Cyprus, singing arias and duets in a concert with sets and costumes, called "Tribute to Maria Callas" in which he interpreted, among others, Verdi's Otello.

In April he appeared in an evening of celebration in honor of Danai, a Greek singer very famous in the 1930s, where he sang an unusual repertoire for him, songs by Attic, Hairopoulos, and others.

Frangoulis played the part of Alfred Drake, a Broadway star of the 1960s, and he sang the duet 'So in Love' from Kiss Me, Kate, with Lara Fabian.

[citation needed] In July and August, his second foray into the Greek tragedy: the leading role of Achilles in the lost Aeschylus trilogy Achilleis, recently reconstructed from fragments of Aeschylus verses, completed with verses from Homer's "Iliad" in a translation of Ilias Malandris directed by Nikos Haralambous, with the Cyprus Theatrical Organization, with prestigious co-stars such as Despina Bebedelli, Dim.

He then flew to Japan where, on 11 October, he gave a concert at the Bunkamura Orchard Hall with the Tokyo City Philharmonic Orchestra conducted by Shuya Okatu and soprano Maki Mori.

[citation needed] During the months of February and March he was in the US for his first American tour of 28 cities with pianist Jim Brickman and Ann Cochran, to promote his album.

[citation needed] In 2014 Mario Frangoulis performed with the acclaimed Norwegian soprano Sissel at a concert on Friday 5 September at the Odeon of Herodes Atticus in Greece.

As a producer full of loyalty and kindness, Frangoulis has organized charity shows and concerts for children in need, such as the one for the Michael S. Polemis Foundation.