The actress was previously rocking a bonce mixed with shades of gold and honey blonde, but yesterday (27 August) she debuted a much more dramatic hair colour - platinum!
Taking to Twitter to show off her makeover, the starlet wrote: "Midnight makeovers. @davestanwell makes it happen."
We're not sure if we'd hit the hair dye at 12am, but hey - each to their own!
It also looks like the stylista went a bit shorter with her tresses, chopping them into a blunt bob which just grazes her jawline while sweeping her fringe to one side.
We reckon she looks stunning, and we're not the only ones - Dianna received a whole host of tweets from fans praising her fresh mane, with one writing: "love the new look lady!!"
And we couldn't help but notice how naturally beautiful Dianna was in her Twitter snap, even without heaps of make-up. Why don't we look that good at midnight?! It's not fair!
What do you think of Dianna's new platinum hair? Let us know by commenting below as the best comment across the site each week wins £50!
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