PORTLAND – Guest conductor Robert Lehmann will lead the Portland Symphony Orchestra Saturday and Sunday, Oct. 27-28, in “A Little Fright Music,” a “spirited” program of classics opening the orchestra’s 2007-2008 Pops season.

Highlighting the relationship between film and music, the performance features excerpts from horror films and other eerie images projected onto a large screen over the orchestra. Concertgoers are encouraged to dress in Halloween costumes.

The evening’s program includes music from Stravinsky’s “Firebird,” “Catacombs” from “Pictures at an Exhibition,” “The Sorcerer’s Apprentice,” “Harry Potter and the Sorcerer’s Stone Suite,” music from “Spider-Man” and highlights from the hit musical “Wicked.”

The performance will begin at 2:30 p.m. at Merrill Auditorium.

Lehmann is director of string studies and assistant professor of music and artist faculty in violin and viola at the University of Southern Maine School of Music, where his duties include conducting the Southern Maine Symphony and the Portland Youth Symphony orchestras. He is also music director of the Portland Chamber Orchestra.

The next PSO concert will be a Sunday Classical Stravinsky Celebration at 2:30 p.m. Nov. 4, conducted by Joseph Silverstein.

The PSO Pops will return with “Vocal Valentine” Saturday and Sunday, Feb. 16-17, conducted by Julian Wachner and featuring guest singers Lisa Saffer and John McVeigh.

Tickets may be purchased by calling PortTix at 842-0800; by visiting the PortTix box office at 20 Myrtle St. between noon and 6 p.m. Monday through Saturday; and online at www.porttix.com.