Friedrich-Karl "Tutti" Müller (25 December 1916 – 29 May 1944) was a German Luftwaffe military aviator and wing commander during World War II. As a fighter ace, he is credited with 140 aerial victories claimed in more than 600 combat missions. He claimed eight aerial victories during the Battle of France, 89 on the Eastern Front, and further 43 victories against the Western Allies in the Mediterranean Theatre and in Defense of the Reich, including 24 four-engined bombers.