Dianna Agron showcases stunning engagement ring

Dianna Agron is engaged to her Mumford & Sons' beau, Winston Marshall!

While the happy couple - who were first spotted together in July last year - got engaged over the festive period, the Glee actress has been keeping the engagement ring under wraps - until Erdem's runway show at London Fashion Week earlier this week... And it's very pretty.

For those who prefer appreciating threads over diamonds, here's a wee bit more of that Ederm dress Agron sported to the event.

Any thoughts on this classic ring?