She was first elected to the Vojvodina Assembly in the 2004 provincial election. At the time, half of the members in Vojvodina's provincial assembly were elected in single-member constituency seats and the other half by proportional representation. Sedlarević was included on the electoral list for the LSV-led Together for Vojvodina coalition and was awarded one of its six list mandates.Одлука о укупним резултатима избора за посланике у Скупштину Аутономне Покрајине Војводине (2004 election), Provincial Election Commission, Autonomous Province of Vojvodina, Republic of Serbia, accessed 9 August 2018. Together for Vojvodina joined the province's coalition government after the election, and she served as a supporter of the administration.
