Lohan, 25, who plays dame Taylor in the film, sported darker locks and arranged it in an updo style when she was spotted during the pre-production of the biopic, reported Ace Showbiz.
The production of the biopic itself will kick off on June 4 in Los Angeles.
"All her clothes are made. All her jewelry is made. Come Monday morning, Liz and Dick will live again. Lindsay is excited and so into it. She went from being unfocused to being totally focused now that the movie is up and going," director Lloyd Kramer said.
"Liz & Dick" chronicles the enduring love of movie icons Taylor and Richard Burton, whose fiery romance was the most notorious, publicized and celebrated love affair of its day.