Producers are holding an open audition at Gotham’s Apollo Theater next month for an upcoming U.S. tour of “Dreamgirls” — a production that will include “Listen,” the Oscar-nommed song penned for the 2006 movie version and sung onscreen by Beyonce Knowles.No Broadway plans have been nailed down for “Dreamgirls,” although the tour, aiming to go out in fall 2009, seems a likely run-up to a Rialto run. The touring production, directed by Robert Longbottom (“Side Show”), is related to an upcoming Korean staging also helmed by Longbottom. Tour choreography is by Shane Sparks, a judge on Fox skein “So You Think You Can Dance.” “Dreamgirls” is produced by John Breglio for Vienna Waits Prods., producer of the recent revival of “A Chorus Line.” Breglio, also an entertainment lawyer, is the executor of the estate of the late Michael Bennett, who helmed and choreographed the original 1981 Broadway production of “Dreamgirls” (as well as the 1975 “A Chorus Line”). Henry Krieger wrote the score for “Dreamgirls,” as well as “Listen” and two other songs composed for the pic. Book and lyrics are by the late Tom Eyen. It’s said that changes may be incorporated into the book to reflect those made by helmer-adapter Bill Condon in the movie version, but such rewrites remain unconfirmed (and so far uncredited). At the open call at the Apollo, the Harlem venue famous for its amateur nights, casting directors for “Dreamgirls” are looking for women in their 20s as candidates for the three starring roles, members of a fictional 1960s R&B group. Auditions are skedded for Nov. 1.