From Wikipedia, the free encyclopedia. Declan Joseph Oliver "Dec" Donnelly (born 25 September 1975) is one half of the English acting and TV presenting duo Ant & Dec, with the other being Anthony McPartlin. He came to prominence in the children's drama series Byker Grove and as one half of the pop music duo PJ & Duncan. Since then, Ant & Dec have had a very successful career as TV presenters, presenting programmes such as SMTV Live, Friends Like These, Pop Idol, Britain's Got Talent, I'm a Celebrity... Get Me Out of Here!, Ant & Dec's Saturday Night Takeaway, PokerFace and Push the Button. They have also returned to acting, starring in a 2002 Tribute to The Likely Lads and the 2006 film Alien Autopsy. Description above from the Wikipedia article Declan Donnelly, licensed under CC-BY-SA, full list of contributors on Wikipedia.