According to OK magazine, the couple, which have been together since 2004 made the engagement public at a fashion show where Tara was seen wearing a large diamond ring (some girls have all the luck).
Chris and Tara are said to be planning their big day although no details have yet been announced.
A source told the magazine: “It all happened very recently. This is the first time they’ve appeared in public with her wearing that huge diamond.”
Watch this space for more information, and in the meantime we’re going to console ourselves by watching the Sex and the City box set and imagining what could have been.