In March 2008, Perry was announced as one of the final 12 contestants in the BBC1 programme ''I'd Do Anything
, which premiered on 15 March 2008 and aimed to find a performer to play Nancy in a West End revival of the musical Oliver!''. Perry was eliminated from the show in week eight but has since gone on to have a successful career in musical theatre. Perry played the lead role of Belle in the musical
Only the Brave, which had its world premiere at the
Edinburgh Festival Fringe on 31 July 2008 at the George Square theatre and ran until 25 August. On 13 September 2008 she performed alongside fellow ''I'd Do Anything
finalist Rachel Tucker at the Proms in the Park'', held at
Belfast City Hall as part of the nationwide celebration of the
BBC Last Night of the Proms. Perry was a featured vocalist with the
BBC Concert Orchestra on the
BBC Radio 2 programme
Friday Night is Music Night in October 2008. On 16 November 2008, Perry sang at
St Paul's Cathedral in the
City of London at a fundraising and awareness raising event for
Save the Children. She was the joint lead vocalist with opera singer Mark Stone as they sang the
premiere performance of "The Cry, a requiem for a lost child". She appeared in
pantomime at the
Devonshire Park Theatre in
Eastbourne, East Sussex from 12 December 2008 to 11 January 2009 in
Show White and the Seven Dwarfs playing the lead role of
Snow White alongside
Stefan Booth. In May 2009, Andrew Lloyd Webber revealed on an episode of '
Friday Night with Jonathan Ross' that Perry would be singing one of the roles on the Original Cast Recording for
Love Never Dies, the sequel to
Phantom of the Opera, describing her as "wonderful". On Monday 15 June 2009, Niamh began playing the lead role of Sophie Sheridan in
Mamma Mia! The Musical at the Prince of Wales Theatre, London, with
Sally Ann Triplett as Donna. On 19 March 2011 she was the wedding singer for the
BBC Three live musical drama
Frankenstein's Wedding. In 2012, Perry gained positive reviews for her portrayal of Kim in the
Boy George musical
Taboo. Perry went on to impress as
Johanna Barker in
Sweeney Todd: The Demon Barber of Fleet Street at the
West Yorkshire Playhouse and then at
Royal Exchange, Manchester. In February 2014, it was announced that Perry had been selected to lead the cast of the revival of
Andrew Lloyd Webber musical
The Beautiful Game when it returned to London. She went on to receive much critical acclaim for her portrayal of Mary. ==Thomas & Friends==