"Two And A Half Men" actress and former Disney star Aly Michalka recently announced her engagement to director fiance Stephen Ringer via Instagram on Tuesday.

She posted a photo of her and her brother hinting at her followers to "look closer." She later on posted a close up of the diamond ring, captioning the photo "He did good."

In the past, celebrity couples have also sported some very shiny and mostly expensive engagement bling. Some of the most popular rings would be Angelina Jolie's ring which long-term partner Brad Pitt co-designed himself, Kim Kardashian's ring from Kanye West, and of course Kate Middleton's sapphire engagement ring from Prince William which was originally the late Princess Diana's.

How about Kelly Clarkson's beautiful yellow stunner? Or Gwen Stefani's unique ring designed by husband Gavin Rossdale? Beyonce also got a fabulous 18-carat diamond ring from Jay Z.

Look through the photos for some of the most stunning celebrity engagement rings.