Sir Leonard George Holden Huxley KBE, FAA (29 May 1902 – 4 September 1988) was an Australian physicist.

His family migrated from England to Australia in 1905 when he was three, and settled in Tasmania, where Huxley showed great academic and sporting promise while attending The Hutchins School.

He won a Rhodes Scholarship to New College, Oxford while in his second year at the University of Tasmania and obtained a D.Phil.

On 5 October 1929 he married Ella Mary Child 'Molly' Copeland who was reading history at Somerville College.

[2] He was elected a Foundation Fellow of the Australian Academy of Science in 1953,[4] and knighted in 1964.