Peter Joseph Lenné (the Younger) (29 September 1789 – 23 January 1866) was a Prussian gardener and landscape architect.
As director general of the Royal Prussian palaces and parks in Potsdam and Berlin, his work shaped the development of 19th-century German garden design in the Neoclassical style.
Laid-out according to the principles of the English landscape garden, his parks are today part of the UNESCO World Heritage.