In the 1980s, Seymour began a career as a writer of self-help and inspirational books, including Jane Seymour's Guide to Romantic Living (1986), Two at a Time: Having Twins (2002), Remarkable Changes (2003), and Among Angels(2010). She also co-authored several children's books with her ex-husband James Keach for the This One 'N That One series. In 2008, Seymour replaced Selina Scott as the new face of the British fashion label CC (formerly known as Country Casuals).