This is an announcement for the paper "Diagonal extendible multilinear operators between $\ell_p$-spaces" by Daniel Carando, Veronica Dimant, Pablo Sevilla-Peris and Roman Villafane. Abstract: We study extendibility of diagonal multilinear operators from $\ell_p$ to $\ell_q$ spaces. We determine the values of $p$ and $q$ for which every diagonal $n$-linear operator is extendible, and those for which the only extendible ones are integral. We address the same question for multilinear forms on $\ell_p$. Archive classification: math.FA Mathematics Subject Classification: 47H60, 46B45, 46G25 Submitted from: rvillafa@dm.uba.ar The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1403.4577 or http://arXiv.org/abs/1403.4577