LONDON — Judi Dench was serenaded by firefighters as she arrived for the London premiere of her latest film.

Dench walked the red carpet in Leicester Square on Wednesday for the London Film Festival screening of “Philomena.”

The movie tells the true story of Irishwoman Philomena Lee’s quest to track down the son she was forced to give up for adoption 50 years earlier.

Members of the Fire Brigades Union spotted the 78-year-old star, chanted “We love you Judi” and broke into a rendition of the Beatles song “Hey Jude.”

The Stephen Frears-directed film also stars Steve Coogan as Martin Sixsmith, a journalist who helped Lee in her search and wrote a book about her story.