Christian Horner had a daughter with his partner Beverley Allen. Horner later became involved with Geri Halliwell, a member of the Spice Girls.

On November 11, 2014, the pair confirmed their engagement. They eventually married on May 15, 205 in Woburn, Bedfordshire. They announced they were expecting their first child on October 10, 2016.

In 2005, Geri Halliwell had a relationship with Sacha Gervasi, a screenwriter. In February 2014, she began dating Horner after her divorce from Sacha. She is a singer, songwriter, novelist, actress, and philanthropist from the United Kingdom.