[EN] The NGATHA (NGA) clade of transcription factors (TFs) forms a small subfamily of four members in Arabidopsis thaliana. NGA genes act redundantly to direct the development of apical tissues in the gynoecium, where they have been shown to be essential for style and stigma specification. In addition, NGA genes have a more general role in controlling lateral organ growth. The four NGA genes in Arabidopsis are expressed in very similar domains, although little is known about the nature of their putative regulators. Here, we have identified a conserved region within the four NGA promoters that we have used as a bait to screen a yeast library, aiming to identify such NGA regulators. Three members of the TCP family of TFs, named after the founding factors TEOSINTE BRANCHED 1, CYCLOIDEA and PROLIFERATING CELL FACTOR 1 AND 2), were recovered from this screening, of which two [TCP2 and TCP3, members of the CINCINNATA (CIN) family of TCP genes (CIN-TCP) subclade] were shown to activate the NGA3 promoter in planta. We provide evidence that support that CIN-TCP genes are true regulators of NGA gene expression, and that part of the CIN-TCP role in leaf development is mediated by NGA upregulation. Moreover, we have found that this TCP-NGA regulatory interaction is likely conserved in angiosperms, including important crop species, for which the regulation of leaf development is a target for biotechnological improvement., This work was supported by the Spanish Ministerio de Ciencia e Innovacion (grants BIO2009-09920 to C. F. and BIO2010-17334 to L. O.) and the Spanish Ministerio de Economia y Competitividad (grants BIO2012-32902 to C. F. and BIO2013-46076-R to L. O.) and Predoctoral Fellowships to P. B. (JAE-Pre, from CSIC) and M. N. G (Generalitat Valenciana). Furthermore, C. F. acknowledges the support of the European Union FP7 project EVOCODE (grant 247587). We thank Irene Martinez-Fernandez, Francisco Madueno, Concha Gomez Mena, Amelia Felipo and Laura Campos (IBMCP) for providing material and technical advice and Antonio Villar Orozco (IBMCP) for technical assistance in the greenhouse.