This article deals with the first documented and successful breeding of White-tailed Sea-eagle (Haliaeetus albicilla) in Turiec and Liptov regions in northern Slovakia. In the Turiec Basin, two different breeding attempts were observed in 2020 and 2021. The two nests of the one pair were located on different trees of the Scots pine (Pinus sylvestris) and in total four eaglets fledged. In the Liptov Basin, one pair bred successfully on a European larch (Larix decidua) in 2021, and brought up one eaglet. All these breeding attempts were successful thanks to regular monitoring of localities, strengthening of unstable nests, guarding against man-induced disturbance and possible tree felling, and by declaration of a protection zone.