Alfred Giovanni Roncalli Boe was born in Blackpool in 1973. His first public performance at the age of 14 was at Fleetwood's Marine Hall in a 'Songs from the Shows' presentation organised by a local singing teacher, Lottie Dawson.

At the age of 17 he became an apprentice mechanic at the TVR factory in Bispham where enjoyed entertaining his colleagues by singing opera arias while he polished the cars. One day he was overheard by a client with connections in the music industry who suggested Boe should go to London and audition for the D'Oyly Carte Opera Company.

His audition was a success and he gave up polishing cars to embark on a singing career, moving to London where he studied singing at the Royal College of Music, the National Opera Studio and as part of the Royal Opera House's Vilar Young Artists Programme.

Some years later he took the role of Jean Valjean in a concert performance of the musical Les Misérables at the O2 Arena in London to celebrate the 25th anniversary of the show. He took the role again in 2011 at the Queen's Theatre in London from 23 June to 26 November, and again subsequently in 2015 in the Broadway revival of Les Misérables at the Imperial Theatre in New York.

He once more reprised the role of Valjean at the Gielgud Theatre in a staged concert production of Les Misérables that opened on 10 August 2019 and closed 30 November 2019.