Greg trained at the Magnet and UCB theaters in New York. Currently, he is half of the sketch comedy group, Kelly and Greg. You may have seen him in such shows as: Henry Clay Frick Presents: Kelly Buttermore and Greg Wilker Can’t read, Kelly and Greg Present: A night of Scatological Humor, and Kelly and Greg Present: Abraham Lincoln. Greg was on numerous improv teams that regularly performed at the Magnet Theater. These teams included: Dwayne's Guest House, The Future, The Boss, andKing Canute.