Brian Stack is an American actor, voice actor, comedian, and writer.
In live action, he is best known for his work on talk shows by Conan O’Brien: Late Night with Conan O'Brien and The Tonight Show with Conan O'Brien. Later, he left the Conan O’Brien series to become a member of The Late Show with Stephen Colbert.
His roles in animation included playing an airplane pilot for Hotel Transylvania, a gangster in Snake ‘n’ Bacon, and, more notably, Dr. Internet Doctor in Talking Tom and Friends.
For Wordgirl, he guest starred as Captain Tangent for "The Penny, the Pony, and the Pirate", replacing John Henson who didn’t return to voice the character. He also guest starred in a background role as the World Record Judge for "World’s Best Dad", and the Inspiration Day Host in "A Few Words From WordGirl".