Eliza McCardle Johnson was the first lady of the United States from 1865 to 1869 as the wife of President Andrew Johnson. She also served as the second lady of the United States from March until April 1865 when her husband was vice president. Johnson was relatively inactive as first lady, and she stayed out of public attention for the duration of her husband's presidency. She was the youngest first lady to wed, doing so at the age of 16.