Stefan Petrus Dekker (born 31 July 1988) with his sister Nora, better known by his stage name Dr. Peacock, is a Dutch frenchcore DJ and record producer.

He has performed on the main stages of major festivals like Thunderdome, Defqon.1, Qlimax and Dominator.

That same year, Dr. Peacock collaborated with Angerfist to produce a track for his album The Deadfaced Dimension.

[citation needed] Frenchcore's popularity grew quickly in The Netherlands, with Dr. Peacock performing at Defqon.1 in 2014.

During this period, Dr. Peacock worked heavily with Sefa, producing collabs such as "This Life Is Lost" and "Trip To Turkey".