Posted by babu 12:20pm GMT
In case you've been living under a rock (or, in Kate Middleton's case, quite a few), Prince William and his longtime love interest are officially headed for the long haul.
To seal the deal, Prince William proposed marriage with the late Princess Diana's 18-carat sapphire and diamond engagement ring, sparking a huge demand for sapphire rings and knockoffs alike across the Web and beyond.
Steal soon-to-be Princess Catherine's royal style with the Victoria Wieck 4.58ct Absolute™ and Created Sapphire Baguette Ring, $89.95, at hsn.com.
Celeb photo: MirrorPix/Splash News
!["How I Met Your Mother"](http://mylt.ltcdn.com/d6/sites/mylifetime.com/files/images/imagecache/carousel_159x119/2011/01/12/HIMYM-159x119.jpg ""How I Met Your Mother"")
