Mezue ahịrịokwu na-esonụ: N'afọ 1996, Tiernan nwetara ihe nrite Channel 4 "So You Think You're Funny". Afọ abụọ ka e mesịrị, e nyere ya ihe nrite nke
Perrier Comedy Award na 1998 Edinburgh Festival Fringe ma merie Best Stand-Up Award na British Comedy Awards. N'afọ 2003, ọ meriri Nokia Best of the Fest Award na Orange People Choice Award na Edinburgh Comedy Festival. N'afọ 2006, ọ meriri Ireland's Funniest Living Person Award na People of the Year Awards.