Michelle Obama adds second Chicago event, brings along David Letterman, Heather McGhee

Michelle Obama has added a second Chicago date to her upcoming book tour, and invited comedian David Letterman and author Heather McGhee along for the fun.

Already booked for Dec. 5 at the Chicago Theatre, the former first lady said Wednesday that she’ll also take the stage the next night.

At each event she’ll be joined by a moderator, and tour planners announced Wednesday that Letterman, the former CBS “Late Show” host, will fill the role on Dec. 5. At Obama’s side Dec. 6 will be McGhee, author of “The Sum of Us: What Racism Costs Everyone and How We Can Prosper Together.”

Tickets are available at www.michelleobamabooks.com. Tickets range from $99 to $350, and some include a copy of the book.

Called “The Light We Carry: Overcoming in Uncertain Times,” it comes out Nov. 15.

Set to moderate at other stops on the six-city tour are Ellen DeGeneres, Elizabeth Alexander, Gayle King, Hoda Kotb, Tyler Perry, Conan O’Brien, Tracee Ellis Ross, Michele Norris and Oprah Winfrey.