Fountain first came to prominence in 2003, when he joined the Channel 4 soap series Hollyoaks, in the role of Justin Burton. In 2008 Fountain won the British Soap Award for Best Actor due to his role on Hollyoaks.[4] It was confirmed on 11 March 2009 that Fountain would be leaving Hollyoaks.[5] He left on 3 June 2009 in a joint exit storyline alongside Jamie Lomas who plays Warren Fox.
In February 2006, Fountain came in third in the BBC show Just the Two of Us, a singing competition in which celebrities are paired up with professional singers and are voted off, day by day. His singing partner was former S Club 7 member Jo O'Meara.
Fountain was a runner up in the third series of ITV show Dancing on Ice, in which he was partnered with skater Frankie Poultney. He also won the Dancing on Ice Tour 2008 with 24 wins and went home with the Dancing on Ice Tour Winners Trophy for winning the most shows. Second place went to Suzanne Shaw with eleven wins and third place went to Kyran Bracken with nine wins.[citation needed]
In January 2010, Fountain appeared as a patient called Seb in Casualty. Fountain played the role of PC Paul Tait in the BBC drama Five Days in March 2010.
In November 2010, it was announced that Fountain would play the role of Tommy Duckworth in Coronation Street and made his first on-screen appearance in March 2011.[6][7] Fountain made his final appearance on 13 October 2013, with his character having an off-screen exit on 23 October 2013.
Fountain played the title role in the pantomime Aladdin at the Manchester Opera House over the Christmas/New Year period of 2009/2010. In 2010 he appeared in the new musical Departure Lounge for a short run at the Waterloo East Theatre in London.
Fountain was sacked from Coronation Street following a video of him rapping about rape under an alter ego called "The Phantom", the video having been recorded years before. Fountain apologised for the incident.[12]
In June 2006, Fountain injured himself on location whilst filming for Hollyoaks when he touched an electric fence.[13]
In October 2022, Fountain revealed in a social media post that he had suffered a transient ischemic attack in that August, for which he was undergoing treatment at the Royal London Hospital.[14] It was later revealed Fountain had undergone heart surgery to repair a patent foramen ovale which had caused the original transient ischemic attack.[15]