The Sheffield native, born on 8 October 1998, is an former England youth international from Under-15s to Under-21s level.
During her maiden season with the Foxes, Tierney was an almost ever-present at centre-back as LCFC Women won promotion from the Barclays Women's Championship for the very first time.
She opened her account for the Club, with a brace of goals to secure a 2-0 win at Durham in March 2021, before scoring the goal that helped seal the title against London City Lionesses a month later.
Missing just one WSL fixture in 2021/22, the versatile defender scored her first goal of the season in the home victory over Birmingham City in December 2021 - LCFC Women's maiden top-flight win.
After achieving safety on the final day of the 22/23 season, she signed a new two-year-contract, remaining with the Club until the summer of 2025, as she remains a mainstay in Willie Kirk's side, having transitioned into central midfield under the Scotsman.