The project was thrown into doubt in May when Jackie Chan said he was unlikely to return, but producer Arthur Sarkissian appeared more positive in July.
"I am working on Rush Hour 4 right now with Chris Tucker and Jackie Chan," Sarkissian hinted over the summer. "I'm trying to do it closer to how I did Rush Hour 1, more down to earth, more gritty, introduce two new characters and make it real the way the first one was."
Tucker was asked for an update on a possible Rush Hour 4 while attending a Silver Linings Playbook screening in LA last week.
"It's going to be a lot of fun," he responded to E! News, adding: "I hope it happens. We need to do one more."
The actor went on to suggest that he was excited by the possibility of reuniting with Chan on the big screen.
"I just want us to be free and do our thing," he said. "I love working with Jackie, being around Jackie. Stuff just happens when we're together."
Rush Hour 3 took in $258 million (£161 million) at the box office in 2007, but earned mixed critical reviews.
Watch a trailer for Rush Hour 3 below: