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Liv Rooney (portrayed by Dove Cameron) is famous identical twin sister of Maddie. Liv also has two younger brothers and two parents that both work at her school. She is a television star who's show just ended. When she returns home from filming her TV series in Hollywood to her family in Wisconsin. She becomes a bit more popular when attending the same public high school of her siblings, which little to her knowing, is a big problem to Maddie. Liv is more of the girly-girl compared to Maddie. It is possible that Liv is short for Olivia.