Eimer Ní Mhaoldomhnaigh (/ˈiːmər niː veɪlˈdaʊnɪɡ/ EE-mər nee vayl-DOWN-ig, Irish: [ˈɪmʲəɾˠ n̠ʲiː ˈweːl̪ˠd̪ˠoːnˠiː]) is an Irish costume designer. Much of her career has been in Irish and British-Irish productions, such as Michael Collins (1996), The Wind That Shakes the Barley (2006), Brideshead Revisited (2008) and Ondine (2009). She has been nominated six times for Best Costume Design from the Irish Film & Television Academy.