Tommy Tiernan (born 16 June 1969) is an Irish comedian, actor and writer.
On June 16, 2006, Tiernan appeared for the first time on the Late Show with David Letterman, after which he expressed his delight at being mentioned between actor Robert Duvall and music group Sonic Youth at the start of the show. Tommy goes on to appear 3 times on the Late Show with David Letterman.
In 1996 Tiernan won the Channel 4 "So You Think you're Funny" award. Two years later he was awarded the Perrier Comedy Award, at the 1998 Edinburgh Festival Fringe and won the Best Stand-Up Award at the British Comedy Awards. 2003 he won the Nokia Best of the Fest Award and the Orange People Choice Award at the Edinburgh Comedy Festival. In 2006 Tommy won Ireland's Funniest Living Person Award on the People of the Year Awards.
In 2010 Steve Bennett, founder of chortle, chose his top 50 Comedy performances of the last decade. At number 2 was Tommy Tiernan with a Gala performance in Montreal.
Tiernan has been a regular performer at national and international comedy festivals including the Edinburgh Festival Fringe, Just for Laughs Montreal Comedy Festival, New York Comedy Festival and the Kilkenny Cat Laughs Comedy Festival. In 2008, Tommy and Hector Ó hEochagáin formed as a radio duo on "The Tommy and Hector Show" on i102104 after hinting at a desire to be on the radio, months before on The Late Late Show. Speaking about his new role, Tommy says "I've always wanted to have loads of craic on the radio. What better way to have a mountain of devilment than to do a show with my best friend." Following the success of their show on iRadio Northwest, the show has now moved to the nationwide slot of Saturday 10am-12pm on 2FM.
In 2009, Tiernan set the Guinness World Record for the longest stand-up comedy show by an individual achieving 36 hours and 15 minutes at Nuns Island in Galway (12 April 2009).