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Two future presidents, Thomas Jefferson and John Adams, were among the signatories. Edward Rutledge (age 26) was the youngest signer, and Benjamin Franklin (age 70) was the oldest signer. John Hancock's now-iconic signature on the Declaration is nearly 5 inches (13 cm) long.
On July 4, 1776, Continental Congress President John Hancock's signature authenticated the United States Declaration of Independence. Historians have generally accepted McKean's version of events, arguing that the famous signed version of the Declaration was created after July 19, and was not signed by Congress until August 2, 1776.