A congressman is on his way to Comic-Con.

Rep. John Lewis will be among the thousands of comic book fans flocking to the annual convention this week in San Diego. But there’s a good reason the Georgia Democrat is heading to the geektastic event, which typically attracts more costumed comic book fan-types than House members. He's there to promote his upcoming graphic novel, March.

The trilogy — due to hit store shelves in August to coincide with the 50th anniversary of the March on Washington — details the 13-term lawmaker’s work with the civil rights movement.

Lewis laughed to The San Diego Union-Tribune that a March co-writer has been prepping him for his first visit to the largest comic book gathering in the United States: “He said to be just be myself. He suggested I wear my old backpack and trench coat.”

Lewis, 73, continued, “In my advanced years, I have seen humans from other planets, so I know I’ll be comfortable.”

With the release of the illustrated tale, Lewis will become the first sitting member of Congress to author a graphic novel.

Lewis, who will be signing copies of the first book in the trilogy on Saturday at Comic-Con, said of the true-life story, “I feel very good that 'March' will continue to preach the message of faith, hope, peace, love and nonviolence. We are one family, one people, one house.”