Borislav Georgiev Milanov (Bulgarian: Борислав Георгиев Миланов; pseudonym: B-OK) is a Bulgarian music composer, songwriter and record producer known for his work on the Eurovision Song Contest. He has collaborated with Alexandra Stan. Milanov is a co-producer of the Bulgarian Eurovision participation in 2017, 2018 and 2020 and the creator of Equinox. He is the founder of the label “Symphonix International”, headquartered in Vienna, Austria.

Source: Wikipedia (https://en.wikipedia.org/wiki/Borislav_Milanov)