On The Tonight Show, the 57-year-old said the film is due in cinemas on 15 October 2027, earlier than a previously reported 2028 date.
Fraser said Rachel Weisz and John Hannah will return, reviving key cast members from the first two films as he prepares to reprise adventurer Rick O'Connell.
The sequel follows 2008's poorly received Tomb of the Dragon Emperor and marks Fraser's first action role in years after his Oscar-winning turn in The Whale.
With the original cast returning, will 'The Mummy 4' erase the unpopular third film and the story of Rick and Evy's son?
After the 2017 reboot failed, can Brendan Fraser's return make 'The Mummy' a modern box office champion nearly two decades later?
Can horror-focused directors successfully blend suspense with adventure to recapture the beloved, fun-loving spirit of the original trilogy for a new generation?