Constance Elaine Trimmer Willis, commonly known as Connie Willis, is an American science fiction and fantasy writer renowned for her prolific contributions to the genre. With a career spanning decades, Willis has garnered widespread acclaim, securing eleven Hugo Awards and seven Nebula Awards, making her one of the most honored authors in science fiction. Notably, she became the first author to win Hugo Awards for all books in a series, with her acclaimed Time Travel series or Oxford Time Travel Series, which includes the short story "Fire Watch," the novels Doomsday Book and To Say Nothing of the Dog, and the two-part novel Blackout/All Clear. These works, featuring time travel by history students at the future University of Oxford, have captured the imaginations of readers worldwide.

Willis was inducted into the Science Fiction Hall of Fame in 2009 and was named the 28th SFWA Grand Master by the Science Fiction Writers of America in 2011, underscoring her significant impact on the field. Her writing is characterized by a blend of accessible prose, emotive storytelling, and a fine sense of humor. Beyond time travel, her works explore diverse themes such as scientific research, near-death experiences, and social commentary, showcasing her versatility as a writer.

Willis resides in Greeley, Colorado, with her husband, Courtney Willis, a physics professor at the University of Northern Colorado, and their daughter, Cordelia. Her passion for Christmas and its related lore has also influenced some of her fantasy writings, further demonstrating her broad range as an author.