There is a new celebrity couple alert. According to the sources, Olivia Munn & John Mulaney are dating. As this is a very new relationship they are taking it very slowly. So it is moving at a slow pace. The couple first met at a church and then continued seeing each other since then. John Mulaney is a famous stand-up comedian, writer and actor. He is thirty-eight years old now. Further, Olivia Munn is a forty years old actress and television host.