Other Theatre credits also include a UK tour as The Spruiker in The Thorn Birds – A Musical, Montague in Michael Bogdanov's production of Romeo and Juliet, Alfred Doolittle in My Fair Lady at Aberystwyth Arts Centre (2008), Burberry for Sherman Cymru, Cocks & Tales for Cwmni 3D, Pennington in The Hired Man (at The Torch Theatre, Milford Haven), The Servant of Two Masters, Contender, A Christmas Carol with Ron Moody as Scrooge, A Child's Christmas in Wales, Fiddler on the Roof at Aberystwyth Arts Centre (2006) Hamlet, Amazing Grace – The Musical, Cymbeline, The Merchant of Venice, Twelfth Night (for Wales Theatre Company), The Merry Wives of Windsor, The Winter's Tale, (at The Ludlow Festival, 2002–04), the award-winning production of Amdani (Sgript Cymru), Cwm Glo (Theatr Gwynedd),Seithenyn A'r Twrw Tanllyd Tanddwr (Canol Y Ffordd), Oliver!
The play, a follow-up to the popular 1978 BBC Wales comedy drama Grand Slam, is described as "a two-hour romp filled with laughs, double meanings and camp humour.
"[1] The summer of 2023 saw Rhys back on stage in Aberystwyth for his fourth Summer Season at Aberystwyth Arts Centre playing Brian in the stage adaptation of the popular film "Brassed Off" He has also appeared in many pantomimes including Snow White at The Coliseum, Aberdare and tours with Stan Stennett in Cinderella and Owen Money in three productions of Aladdin, Jack and the Beanstalk and Cinderella (directed by Michael Bogdanov).
In the 2017–18, pantomime season he appeared in Sleeping Beauty at the Grove Theatre, Dunstable, as King Cuthbert, alongside, Sally Lindsay and John Partridge.
2018–19 saw Ieuan with CBeebies' Katrina Bryan and Sam Rabone in Dick whittington at the Garrick Theatre, Lichfield and for the 2019–20 season he played dame for the first time in England at Northwich Memorial Court in Peter Pan alongside John Altman from EastEnders and Katie McGlynn from Coronation Street.
Cowbois Ac Injans (Opus TV), Y Pris (Fiction Factory), Ar Y Tracs with Ruth Jones (Tidy Productions), and as Arthur in Stella (Sky 1).
He has also recorded two albums on the Flach label – Ni Allwn Droi Yn Ol – (There's No Turning Back) and Y Diddanwr – (The Entertainer).