Stacked histogram of the redshift distribution in the MACS 1149 field, divided into previously known (gray, G16) and new or updated2 (blue) redshifts. As a reference, the redshift of the cluster z_c = 0.5422 is indicated by a red line and that of multiply lensed sources with orange lines (solid and dashed lines for the previously known and new identifications, respectively), including SN Refsdal at z_SN = 1.489.