Gaiman is married to songwriter and performer Amanda Palmer, with whom he has an open marriage. The couple announced that they were dating in June 2009, and announced their engagement on Twitter on 1 January 2010. On 16 November 2010, Palmer hosted a non-legally binding flash mob wedding for Gaiman's birthday in New Orleans. They were legally married on 2 January 2011. The wedding took place in the parlour of writers Ayelet Waldman and Michael Chabon. On marrying Palmer, he took her middle name, MacKinnon, as one of his names. In September 2015, they had a son.