Felix, 19, is widely regarded as one of Portugal's brightest talents since Ronaldo in a remarkable breakout season with Benfica.
The teenager took centre stage in their Europa League quarter-final tie with Eintracht Frankfurt - scoring a sensational treble in the first-leg tie.
He netted with all three shots he has on target while also assisting the fourth goal as the LigaNos outfit punished the ten-man Bundesliga side 4-2.
His exploits on the evening now rank him as the youngest player to score a hat-trick in the Europa League at 19 years and 152 days.
Marko Pjaca previously held the record for Dinamo Zagreb against Celtic in 2014 at 19 years and 219 days.
The academy graduate has now scored 15 goals and registered seven assists in 36 games across all competitions.
— Lorenz Köhler (@Lorenz07Kohler) April 11, 2019