Lindsay Lohan wore violet contact lenses while filming Liz & Dick.
The Mean Girls actress underwent a major transformation to play Dame Elizabeth Taylor in the new film, including changing her eye colour to match those of the late actress.
New York Post columnist Cindy Adams revealed: "Lindsay's yellow hair, red hair, auburn hair got dyed dark for the film.
"But what you don't know is, she was fitted with violet-coloured contact lenses."
As well as the physical changes, Lohan will have spent a lot of time in the wardrobe department during filming as she had a staggering 66 costume changes in the biopic.
Movie bosses recently admitted the costumes were a key part of the film.
Producer Larry Thompson said: "Part of the magic is the wardrobe. And Lindsay wants to bring magic to the movie."
The 80-minute television film recounts the tumultuous relationship between Taylor — who died in March 2011 aged 79 — and Richard Burton.
The pair were married twice, from 15 March 1964 to 26 June 1974 and from 10 October 1975 to 29 July 1976 and had a famously turbulent relationship.
True Blood hunk Grant Bowler plays the Welsh actor in the movie.