Björn Ulvaeus (born 1945) is a Swedish singer, songwriter and producer and co-founder of Pophouse together with EQT founder Conni Jonsson. Pophouse acquires and develops entertainment brands within music, podcast and gaming, and the company began a serious venture into music catalogue investments in 2022.

Björn's fame skyrocketed with the creation of ABBA in 1972, dominating the music scene for a decade. Alongside Benny Andersson, he wrote the hit musical "Chess" in the 1980s and "Kristina from Duvemåla" in 1995. Björn also produced the iconic musical "Mamma Mia!" and its subsequent adaptations such as Mamma Mia! The Party.

As the president of CISAC, he leads an organization supporting songwriters worldwide, while also venturing into music catalogue investments through Pophouse.

In 2021, ABBA announced their comeback with the release of the album "Voyage" and a groundbreaking virtual stage show ABBA Voyage in London.