Rebecca O'Mara is an Irish actress and voice actress who provided voices for the UK and US versions of Thomas & Friends.
She has appeared primarily in theatre shows, but has made a couple of television appearances including the BBC soap opera, "Doctors".
- Caitlin (King of the Railway - The Great Race; excluding Engine of the Future)
- The Second Slip Coach (eighteenth series only)
- The History of Mr Polly (2007)
- Laika (2010)
- Thomas & Friends: King of the Railway (2013)
- Jimmy's Hall (2014)
- Thomas & Friends: The Great Race (2016)
- Doctors (2007)
- Thomas & Friends (2013-2016)
- Line of Duty (2016)
- Red Rock (2017)