The full slate of films for the AFI Docs festival won't be announced until May 21, but AFI has revealed the opening- and closing-night movies for the June 18-22 documentary showcase.

The 12th annual AFI Docs opens with the world premiere of "Holbrook/Twain: An American Odyssey." The movie's subject, Oscar-nominated actor Hal Holbrook, has been starring in the beloved one-man show "Mark Twain Tonight" for six decades, and filmmaker Scott Teems looks at what drives the actor to continue playing the same role. Holbrook will be in town to introduce the film, which will screen at the Newseum.

A still from "Life Itself," the documentary about Roger Ebert, pictured here with Gene Siskel. (Kevin Horan/courtesy of Magnolia Pictures)

On June 21, the closing night movie is "Life Itself." Oscar-nominated documentarian Steve James ("Hoop Dreams") directed the movie, which looks at the life and career of film critic Roger Ebert. The movie will screen at the National Portrait Gallery.