Martin Tielli, born in 1967 in Italy, is a Canadian singer-songwriter. He is a member of the Rheostatics, and has also released material as a solo artist and with the side project Nick Buzz. As well, he has appeared as a guest musician on albums by Barenaked Ladies, Kevin Hearn, The Waltons, Jane Siberry, Ashley MacIsaac, Meryn Cadell and Mia Sheard. He is also a painter, and created most of the album covers for the Rheostatics. In 2005 he shot a movie entitled Black Widow with Mary Margaret O'Hara and Sarah Slean for CBC Television.