Sara Caroline Seger is a former Swedish midfielder renowned for her leadership, tactical intelligence and longevity. After beginning her career in southern Sweden, she established herself with Linköpings FC and captained the club to the Swedish championship in 2009. Her career subsequently took her to Philadelphia Independence and Western New York Flash in the United States, LdB FC Malmö and Tyresö FF in Sweden, and Paris Saint-Germain and Olympique Lyonnais in France.
Seger joined FC Rosengård in 2017 and became one of the club's defining players and captains. She won several Swedish championships with Rosengård before finishing her playing career at the end of the 2024 season. Following retirement she returned to the club in a leadership capacity and became its Head of Football.
At international level, Seger became one of the defining figures of Swedish women's football. She made her senior debut in 2005 and went on to earn a Swedish-record 240 caps, scoring 32 goals. She captained Sweden for many years and won World Cup bronze medals in 2011, 2019 and 2023 as well as Olympic silver medals in 2016 and 2021. She received the Diamantbollen in 2009 and 2019.

Seger participated in the 2026 season of the Swedish television programme Masked Singer Sverige, performing as Gräsklipparen and reaching the final.
After ending her playing career in 2024, Seger moved into football leadership and later became Head of Football at FC Rosengård.