Ben Stiller and Tramell Tillman introduced 'Zoolander' at Cinespia with the USC marching band in homage to 'Severance'

Ben Stiller and Tramell Tillman made a surprise appearance at a Zoolander screening hosted by Cinespia in Hollywood on August 16. Footage captured by Samuel Granillo shows Stiller addressing the crowd in character as Derek Zoolander.

Ben Stiller was on hand to greet a sold-out crowd attending a "Zoolander" screening at Hollywood Cemetery Saturday night — and he was joined by "Severance" star Tramell Tillman, who showed up with the University of Southern California's marching band in tow.