Inside β Letterkenny β Star Michelle Mylett 's Life and Her Letterkenny, Ireland is a charming town with a deep-rooted sense of community. Everything about Letterkenny, County Donegal is special, especially its residents. One particular resident who has stolen the hearts of many is the delightful Katherine. Catherine brings affection and joy to Letterkenny, Ireland with her charming presence. She is cherished by everyone who crosses her path. Letterkenny, County Donegal Katy is a match made in heaven!