‘Scrooge The Musical’, London Palladium

'Other stand out performances came from Roisin Sullivan as the Ghost of Christmas Past. She gave an elegant performance and her voice was stunning' West End Frame, 16 November 2012

 ‘A Man of No Importance’, The Arts Theatre, West-End.

‘Sullivan, who looked almost ethereal in Adele's floral dress and beige heels, handled the underwritten Adele's dramatic scenes with ease and maturity, sparkled when on stage and more than convinced of the peculiar balance between innocent and secretive that her conflicted character demands.’ Miriam Zendle, ‘Westend/Broadwayworld’, 12th February 2010

Roisin Sullivan is memorable as a single mum-to-be who plays Salome’. Robert Gore-Langdon. The Mail, 21st February 2010

‘A Man of No Importance’, The Union Theatre, London (Time Out, ‘Critics Choice’ Award):

‘Patrick Kelliher as Robbie and Roisin Sullivan as Adele are perfectly cast and the score affords them the opportunity of some great songs, particularly Sullivan’s Princess and Kelliher’s rousing The Streets of Dublin.’ Paul Vale,’ The Stage’, 13th November 2009

Róisín Sullivan stands out as Adele, the shopgirl "from someplace north of nowhere" who gets the chance to play a princess’. Sandra Giorgetti, ‘The British Theatre Guide’, November 2009

'Olivier Award-winner Paul Clarkson has just the right combination of believable innocence and beguiling zeal as Alfie, enthusing his loyal band of bus passengers with the nature of art, and Róisín Sullivan, the shy girl from Roscommon who is persuaded to be his Salomé, is a delight'. Giles Cole, 'Whats On Stage', 13th November 2009.

‘Paul Clarkson is a beautifully innocent, tempered Alfie, heading a stalwart comic cast of redoubtable Dubliners, with Róisin Sullivan in particular providing a fine portrait of lost youth’ Lucy Powell, ‘Time Out’, 17th November 2009.

'The same quality of restrained and perfectly observed emotion is evident in Ben De Winter's direction and the performances of the entire cast - and notably Patrick Kelliher as Robbie, Roisin Sullivan as Adele (the pregnant and unwed girl Alfie chooses as his Salome) and the brilliant Paul Clarkson as Alfie.' Robert Gould, 'Broadway World', 13th November 2009.

‘The acting in this piece was fantastic with great performances from Roisin Sullivan and Patrick Kelliher as Adele and bus driver Robbie respectively’ Adrian Pumphrey, The Public Reviews, November 2009

'Sweeney Todd', The Union Theatre, London:

‘The singing is just a joy… Special mentions to …Roisin

 Sullivan (Beggar Woman)…whose voices will stay with me for days.’ Radica Anipke, ‘whatsonstage.com’, 17th November 2008

‘The Beggar Woman was played by Roisin Sullivan. Of course, this role is crucial, as so much of the pathos of the work depends on the audience’s gradual realisation of who she really is…Roisin brought to the role a thorough understanding of the torment of this woman – sometimes mad, sometimes lucid (no pun intended there), sometimes lewd. And always exquisitely sung – especially the lullaby at the end. Just brilliant.’ Peter Auker, ‘sweeneytoddforum.org.uk’ November 2008

there is excellent support from Róisin Sullivan as the Beggar Woman…’ Michael Darvell, 15th November 2008, ‘classicalsource.com’

'Gigi', The Gaiety Theatre, Dublin:

'Roisin Sullivan's Gigi...could travel anywhere' Gerry Colgen, The Irish Times, 16th April 2005

'Roisin Sullivan caught the gaucheness of the young Gigi and the elegance of the transformation to 'swan' with equal aplomb'. Ian Fox, The Sunday Tribune, 24th April 2005

'My Fair Lady', The Gaiety Theatre, Dublin:

'Her singing and acting never failed to grip the attention... an enchanting performance from an exciting new talent' Dick O'Riordan, The Sunday Business Post, 4th April 2004

'As Eliza Dolittle, Roisin Sullivan is a real discovery, singing expressively and acting with confidence.' Gus Smith, The Sunday Independent, 28th March 2004

'Eliza Dolittle, as played persuasively by Roisin Sullivan, sings beautifully, favourites being Show Me and I Can Do Very Well Without You.' Gerry Colgan, The Irish Times, 25th March 2004

'Roisin Sullivan is a real find, with an Eliza that was both charming and explosive as demanded' Ian Fox, The Sunday Tribune, 11th April 2004