Have model and rock star boyfriend had secret marriage ceremony?
The lovebirds were snapped at the Siena Palio in Italy wearing gold bands on their wedding fingers.
Musician Jamie, 40, frontman with The Kills, sported a sharp blue blazer while girlfriend Kate, 36, watched the bareback horse race in a large floppy black hat.
The couple are reported to be house-hunting and have revisited the picturesque island of Stromboli after falling in love with the area on a recent holiday.
has a live volcano which erupted in 2002 but is home to only 850
people, making the spot a perfect hideaway for the frequently snapped stars.
Kate and Jamie met in 2007 after being introduced by mutual friend
Sadie Frost backstage at a Kills concert just three months after Kate ended her controversial relationship with indie rocker Pete Doherty.
The model turned Topshop designer, who also used to date Johnny Depp, has an 8-year-old daughter, Lila Grace, with journalist Jefferson Hack.