Constance Elaine Trimmer Willis is an American science fiction and fantasy writer. She has achieved unprecedented recognition in the field, winning more major genre awards than any other writer in the industry. Willis's accolades include eleven Hugo Awards and seven Nebula Awards. Her novel Blackout/All Clear, published in 2010, won both the Hugo Award and Nebula Award for Best Novel, representing some of her most recent major recognitions. Her contributions to science fiction and fantasy have been formally acknowledged by major institutions in the field. She was inducted into the Science Fiction Hall of Fame in 2009, and in 2011 the Science Fiction Writers of America named her its 28th SFWA Grand Master.