She tells Britain's The Sun, "It defies what you normally see on the red carpet. It's really beautiful - it's pretty but also has a message."
And Livia convinced her husband to wear an equally environmentally-friendly outfit - Colin Firth was sporting a Tom Ford suit made of ethical materials.
He adds, "Livia educated me on the importance of knowing where the clothes you wear come from."
Colin Firth reigned supreme at the ceremony, taking home the Best Actor trophy for his role in The King's Speech.