Ronaldo is the highest scorer of La Liga hat-tricks in Real Madrid's history.
With his treble against Celta, he has now scored three or more goals in 23 league games.
Ramos: 300 La Liga appearances for Real Madrid
Florentino Pérez presented him with a commemorative shirt at the end of the match.
Ramos: “We all enjoy playing alongside a player like Cristiano”
“It was an important victory because Celta are opponents who work hard and pressure a lot”, said Pepe.
Magnus Carlsen took the honorary kick-off against Celta
The Norwegian retained his world chess title on 23 November.
Ancelotti: “We played well, we were solid at the back, quick, and we didn't take risks"
“The entire team's defensive work was very important", he added.
The 18th victory came against Celta
Real Madrid have equalled the record of consecutive victories in the history of Spanish football.
Kroos: "What's important isn't the record, but keeping on winning"
“We want to carry on working, fighting hard and winning”, insisted Marcelo.