Julia Gardiner Tyler, American wife of John Tyler, 11th First Lady of the United States (died 1889)

Julia Gardiner Tyler was the first lady of the United States from June 26, 1844, to March 4, 1845, as the second wife of President John Tyler. A member of the influential Gardiner family, Tyler had many figures as suitors. She met the recently widowed President Tyler in 1842, and agreed to marry him after he comforted her in the aftermath of her father's death. They married in secret, and she became first lady immediately upon their marriage, serving in the role for the final eight months of his presidency.

John Tyler was the tenth president of the United States, serving from 1841 to 1845, after briefly holding office as the tenth vice president in 1841. He was elected vice president on the 1840 Whig ticket with President William Henry Harrison, succeeding to the presidency following Harrison's death 31 days after assuming office. Tyler was a stalwart supporter and advocate of states' rights, including regarding slavery, and he adopted nationalistic policies as president only when they did not infringe on the states' powers. His unexpected rise to the presidency posed a threat to the presidential ambitions of Henry Clay and other Whig politicians and left Tyler estranged from both of the nation's major political parties at the time.

First Lady of the United States (FLOTUS) is a title typically held by the wife of the president of the United States, concurrent with the president's term in office. Although the first lady's role has never been codified or officially defined, she figures prominently in the political and social life of the United States. The first lady of the United States traditionally acts as the hostess of the White House.