Tomorrow, Illinois will mark the 150th anniversary of the slaying of its favorite son, President Abraham Lincoln.

Chris Wills with the Abraham Lincoln Presidential Library and Museum says the noontime ceremony at the neighboring Union Square Park describes Wednesday's Day of Remembrance ceremony.

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Humorist Tom Dreesen, who will be one of David Letterman's final high profile guests this spring, will be the keynote speaker. Musical will also play a central role with Blackhawks anthem singer Jim Cornelison.

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A member of World War II's legendary Tuskegee Airmen, longtime Chicago broadcaster, Lawton “Wilk” Wilkerson will also make an appearance.

There will also be a morning flag raising at dawn at Lincoln's Tom and lowering ceremony at 7:22 am to mark the time of his death.