I've seen
The Ritual a number of times thanks to Netflicks.
Órla's part is voice only. In one scene only you hear her on radio speaking a newsflash that is key to the storyline. The funny thing is Órla, in character as a news announcer, breaks in on music that is Órla, the real life musical artist! (Go figure)
The flick is a sort of contradiction. In many ways it's very poorly done and much, but not all, of the acting is painful to watch. Yet there is somethings about the story and it's treatment of the mysterious past, that keeps me engaged...
This movie was discussed here back in 2008-09. Here is the link:
http://celticwomanforum.com/index.php?topic=5028.0