At the age of 26, she was in car accident that left her with head injuries and a removed eyelid, which was later reconstructed through plastic surgery.
Coddington came into the public eye in 2009 with the release of The September Issue, a fly-on-the-wall documentary about the making of the September 2007 issue of Vogue. She plays a prominent role in the film as she is heavily involved in the styling and production of the issue. Her often-tense relationship with editor Anna Wintour is also highlighted.
She raised her nephew Tristan, since the age of 8, after the death of her sister Rosemary..
In 2010, she announced plans to write a memoir with her collaborator Jay Fielden. The two had previously worked together on the 2002 photo book, Grace: Thirty Years of Fashion at Vogue.. But after Jay took a job as the editor of Town & Country, Grace had to postpone writing the book until 2011, after she decided to write the book with Michael Roberts. The book deal is reported to be worth $1.2 million.. Her memoir, Grace, was published in November 2012.