The proclamation came during a recent photoshoot for Plum Miami magazine in Miami, which took place in May before Lindsay's house arrest.
Although the 25-year-old posed for the magazine, she didn't want to do an interview with the publication's writer Jacquelynn Powers, prompting her to instead write an unflattering piece about Lohan on the set of the shoot.
Lindsay is said to have claimed she 'took ballet until she was 19 and was indignant that she was not considered for the movie Black Swan.'
American-Israeli actress Portman, 30, won an Oscar for her performance in the ballet thriller.