Si Peter William Pete Postlethwaite, OBE (/ˈpɒsəlθweɪt/; 7 Pebrero 1946 – 2 Enero 2011) sarong Ingles na aktor, bistong gayo sa pagpapel sa mga pelikula arog kan sa Dragonheart (1996), Romeo + Juliet (1996), Brassed Off (1996), Amistad (1997), The Constant Gardener (2005), Clash of the Titans (2010), asin Inception (2010).