Maria Leopoldine was born on April 6th 1632 and died on August 8th 1649 aged 17. She was the youngest daughter of Leopold V. and Claudia of Medici. Her siblings were Maria Eleonore (1627-1629), Ferdinand Karl (1628-1662), Isabella Clara (1629-1685) and Sigismund Franz (1630-1665).
At the age of 16 - in 1648 - she married Ferdinand III. in Linz. Although she was very young, she was a good step-mother for Ferdinand's children Ferdinand (1633-1654), Maria Anna (1635-1696 - future wife of Philipp IV. of Spian and Portugal) and Leopold (1640-1705 - later Emperor Leoplold I.), who married Leopoldine's niece Claudia Felicitas in 1673. Maria Leopoldine gave birth to her only child Karl Joseph on August 7th 1649 (died 1664, aged 14). Everybody was celebrating, when Maria Leopoldine suddenly fainted and died at midnight.