Gold has taken to Twitter on Tuesday lunchtime to put Hammers fans at ease and deliver a warning to London rivals Chelsea.
He posted a picture of Rice fist-pumping in his West Ham kit, and captioned it: “I would like to congratulate Declan on his 100th Premier League appearance for West Ham United - a magnificent achievement.
“I am very proud of him and he epitomises everything that this great football club stands for."
Additionally, the joint-chairmen released a further statement on the club's official website, further expressing Rice's importance to the team.
Sullivan and Gold wrote: “On behalf of everyone at the Club, we would like to congratulate Declan on becoming the youngest player to make 100 Premier League appearances for West Ham United – a magnificent achievement.
“Everyone here is very proud of him and he epitomises everything that this great football club stands for."