Olivia "Liv" Rooney (Dove Cameron) is one of a pair of identical twins of the Rooney family. She is the eldest child of the family and older sister to Joey and Parker. Liv left the family for four years, beginning at the age of 11, to star in a popular television program, Sing It Loud!, to which she continually refers. During her time on that show, Liv was living with her Aunt Dena. Liv is a sophomore at Ridgewood High. When Liv and Maddie celebrate their sweet sixteen in "Sweet 16-a-Rooney", Karen states that Liv, who was born at 11:56 PM, is six minutes older than Maddie, who was technically born a day later. Liv's siblings affectionately call her "Hollywood". In "Skate-a-Rooney", it is referenced that in-between seasons of Sing It Loud!, Liv filmed a movie called The Skateboard Bandit. In "Brain-a-Rooney", Liv shows that she is smarter than people think she is by helping Joey and Artie win the Brain Olympics. It is shown that Liv shares the personality quirks of her mother, Karen, as seen in "Shoe-a-Rooney", when the pair reveals their affinity for shoes.