Who said "Be yourself; everyone else is already taken."?

This quote is attributed to Washington Irving.

Be yourself; everyone else is already taken. - Washington Irving

"Be yourself; everyone else is already taken."

Washington Irving

Writer American 1783–1859

"There is a certain magic in sleep and dreams that prepares you for the challenges of real life."

"The mind always makes progress, even when the body stands still."

"Love is the great beautifier of the world."

"Great minds have purposes, others have wishes."