Sighle Bhreathnach-Cashell (b. Belfast 1985) is a visual artist specialising in interactive installation. 


She graduated from the Environmental Art course at the Glasgow School of Art with a first class honours (2011). She has both organised and created works for large scale theatrical art events including ‘PROCEDURE’(Belfast 2011) and ‘GAMES NIGHT!’ (Glasgow 2012). From 2008-2009 she co-curated ‘residence’, a rolling program of artist residencies, exhibitions and outreach work in social housing spaces in Belfast City Centre. Sighle was Chair and Studio Manager at 'Platform Arts', an artist-led charity group in Belfast (2012-2013), and is a co-founder (2012) of 'Household' a curatorial collective who experiment with showing art in urban and domestic spaces.


She is currently based in Belfast since graduating from the Piet Zwart Institute Masters of Fine Art Programme in Rotterdam. Sighle is a member of Array Studios.