Jack Grealish kept his promise to one of his biggest fans after scoring for England vs Iran

Jack Grealish fulfilled a promise to one of his biggest fans after scoring in England's 6-2 victory over Iran.

The Manchester City forward replaced Raheem Sterling midway through the second half to make his World Cup debut.

Grealish capped off a fine performance for the Three Lions with his second international goal in the 89th minute.

After celebrating with his teammates, Grealish found the BBC Sport camera and busted out a little dance.

The dance is in tribute to 11-year-old Finlay, who wrote to Grealish earlier this year.

Finlay is a fan of Grealish not just because of his footballing ability but because of how he looks after his younger sister.

Like Finlay, Grealish's younger sister, Holly, has cerebral palsy. It hasn't stopped the former Aston Villa man from involving her in every aspect of his life and career.

Grealish sent Finlay a signed shirt as well as a letter back. He then decided to surprise him during a visit to the City Football Academy.

Following a chat about a tournament Finlay had just won, Grealish tells the youngster he'll dedicate a celebration to him.

"What would you want me to do?" Grealish asked.

Finlay then said: "Do the worm," which brought a laugh from Grealish. "I can't do the worm, I might get injured," Grealish admitted.

He then managed to compromise on a dance. "I'll do that for you next time I score. I promise," the 27-year-old declared.

"Remember, I've got to score though. I'll do that for you. It was lovely to meet you and I'm glad you're the winner today."

England took an early lead through Jude Bellingham before Bukayo Saka and Raheem Sterling added a goal each prior to halftime.

Saka scored his second after the break, proving why he was in the starting XI. Mehdi Taremi scored a consolation for Iran three minutes later, before Marcus Rashford and Grealish netted from the bench.

Taremi added another consolation in injury time via the penalty spot.