Ben Stiller Surprises Audience as Derek Zoolander at Film Screening

Ben Stiller is bringing “Blue Steel” back … surprising a packed crowd of “Zoolander” fans as his infamous character.

It all went down Saturday night in Los Angeles, during a special screening of the 2001 cult classic at the Hollywood Forever Cemetery.

Ben — or should we say Derek — turned heads by greeting the audience before the movie started … delivering a hilarious bit as he thanked the crowd and mispronounced the show’s organizer, Cinespia.

He joked they had the “courage” to have the first-ever 9-year anniversary screening of “Zoolander 2” … which, as you’ll recall, was a box office flop.

Stiller then told the audience, “Don’t get freaked out by all those creepy gross dead people underneath you” … of course, referencing the thousands of people buried at the historic cemetery.

The surprises didn’t end there … Stiller was interrupted by “Severance” star Tramell Tillman, along with the USC marching band … and the crowd ate it up. You’ll recall, Stiller is also the director and EP of the hit Apple TV series.