Pentatonix is the eponymous overall fourth, and the first mainly originally-written, studio album by American a cappella group Pentatonix, which was released on October 16, 2015. The release date was announced on Twitter by a series of pictures featuring the five band members released over a five-day-span, with one band member added to the picture each day, culminating in the date being revealed on August 28. It is the group's seventh release overall in their discography.