We're big fans of Livia's Green Carpet Challenge which sees her bringing ethical, sustainable, green fashion to industry events and seeing as how Stella is no stranger to ethical fashion we're not surprised that Livia enjoys wearing her designs - you can see Livia wearing a custom-made Stella creation in our Met Ball 2011 gallery.
This time she added an extra touch of eco-friendliness by demonstrating that even though another red carpet regular had worn it before it was more than capable of making a second appearance.
Sounding excited (if a little jittery) she tweeted: "SLIGHTLY nervous 4 my dress tonight! One of my favorite designers #GreenCarpetChallenge but oh my....!!!!!"
We're sure Colin was on hand to give a nice reassuring hug though as there was no trace of nerves in the red carpet pictures we've seen.
And for more fashion repeats, just click through the gallery below: