Fairytale not her thing? These alternative engagement rings are guaranteed to impress non-traditional brides-to-be ...

Here, we explore the most beautiful royal engagement rings from around ... with the iconic 12-carat oval blue sapphire ring surrounded by 14 solitaire diamonds, set in 18-carat white gold.

From Jennifer Aniston and Blake Lively's monster diamonds to Keira Knightley and Carey Mulligan's more low-key designs, we look at the most eye-catching engagement rings owned by the stars.