She is to introduce her documentary, "I Am Because We Are," before a screening. The movie deals with the orphans of Malawi, the African nation where she and husband Guy Ritchie adopted a son.
Madonna is not expected to make any other appearances and might not even stay for the showing.
She appears amid the release of a tell-all book by her brother and speculation about her relationship with New York Yankees star Alex Rodriguez. Madonna and Rodriguez both deny an affair.
