Dennis Muren, A.S.C. (born November 1, 1946) is an American film visual effects artist and supervisor. He has worked on the films of George Lucas, Steven Spielberg, and James Cameron, among others, and has won nine Oscars in total: eight for Best Visual Effects and a Technical Achievement Academy Award. The Visual Effects Society has called him "a perpetual student, teacher, innovator, and mentor."

He has been identified as "a pioneer in bringing a new wave of visual effects films to the public, opening the doors for screenwriters and directors to tell stories never before possible with a new realism through the use of his skills in cinematic arts and advanced technologies."

According to Spielberg, Muren "set the example at Industrial Light & Magic for visual effects excellence with effects that add strong, appropriate emotion to a shot and fit seamlessly into a movie."

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