A 22-year-old man was fatally shot in the face inside an illegal nightclub in Brooklyn early Sunday, cops said.

Jefferson Exantus was attending a party at the unlicensed club on Flushing Avenue near Johnson Avenue in Bushwick around 5:20 a.m. when he got into an argument with another man, also in his 20s, according to police sources.

His rival suddenly pulled out a gun and shot him in the face, cops said.

Exantus was rushed to Woodhull Hospital, where he was pronounced dead, police said.

No arrests have been made.