José Mourinho celebrated his Bernabeu return in style as Kylian Mbappé's hat trick inspired Real Madrid to a 4-1 win over Real Sociedad.
Mbappé bagged a treble to reach 100 goal contributions in 105 appearances (89 goals, 11 assists) and secure a second LaLiga win in a row for Mourinho.
Vinícius Júnior also had a goal and an assist, while another of Madrid's stars, Jude Bellingham, played his part with two assists.
It paved the way for a comfortable win for Madrid but there were some early murmurings of discontent from the Bernabeu crowd after Sociedad had reached halftime at 1-1 with Luka Sucic canceling out Mbappé's opener.
After Saturday's opening league win at Espanyol, Mourinho was back in charge at the Bernabeu -- 13 years after his first spell at Madrid ended.
There was a party mood before kickoff as huge cheers greeted Mourinho's name when it was announced and Madrid fullback Marc Cucurella walked out with a guard of honour to show off the World Cup trophy won by Spain.
Cucurella was joined by Mikel Oyarzabal, who also played his part in Spain's summer success, and the Sociedad striker came close to opening the scoring as Thibaut Courtois blocked with his leg.
The hosts took the lead after 40 minutes when Federico Valverde advanced to pick out Mbappé with a clever pass and the France forward's first touch gave him the space he needed to rifle home left-footed.
But the lead lasted just four minutes. Madrid were caught out by Sergio Gomez's ball from the back and Job Ochieng's shot deflected into the path of Sucic, who gave Courtois no chance with an emphatic finish.
Mourinho was out of his dugout apparently upset that Sociedad fouls were not worthy of yellow cards, but his irritation was soothed by Mbappé restoring Madrid's lead on the hour.
Cucurella and Valverde combined down the left and Sociedad were split open by Mbappé working a one-two with Bellingham and sliding the ball past goalkeeper Álex Remiro.
Bellingham claimed another assist eight minutes later with his tenacity proving critical.
The England midfielder burst into the shot and had a shot blocked, but he won back possession from Luken Beitia to provide Vinícius with the simples of tap-ins.
Mbappé completed his hat trick 10 minutes from time with a chipped finish from Vinícius' brilliant through ball before VAR denied Brahim Díaz a fifth in stoppage time.
PA contributed to this report.