Stretchable Electronics In article number 2102993, Wei Zhu, Yuan Deng and co-workers develop a general scheme to extend a system from a thin-film thermoelectric generator into a 3D adjustable form by rational cut designs and unique patterning procedures inspired by kirigami. The kirigami-based thermoelectric generator with high specific energy output takes the advantages both from the superior fabrication capabilities existing for planar thin-film devices and a compliant mechanism with deformability.