Fletcher joins the production after Singer was sacked on Monday after he failed to show up to set on multiple occasions.
Fletcher has previously directed Eddie the Eagle for Fox and Wild Bill.
Director Bryan Singer's replacement on Queen biopic Bohemian Rhapsody revealed
After Singer was sacked from the film for his unreliability and reports of tensions on the set, he ultimately made a decision to leave the studio altogether after, he claims, they wouldn't allow him time to take care of his ailing mother.
Funnily enough, Singer's replacement - Dexter Fletcher - was originally involved in the biopic back when Ben Whishaw was to play Mercury instead of Mr. Robot's Rami Malek.
It is believed that there are about two weeks' worth of shooting left, unless he decides to reshoot scenes, and it remains unknown what the director credit on the final film will be. That means Bohemian Rhapsody will hit theaters on December 25, 2018, as planned.
Production on the film is set to resume next week in London with Fletcher at the helm, noted The Hollywood Reporter. A mere few days later, he was sacked for "unreliability and unprofessionalism", and allegedly even got into a tense confrontation with Malek over his absences.
"I wanted nothing more than to be able to finish this project and help honor the legacy of Freddie Mercury and Queen", Bryan said in a statement.
But as Variety reports, a source claims Tom Hollander, who portrays Queen band manager Jim Beach, walked away as well because of Singer's behavior, but was convinced to return.
"The full cast of the film was revealed shortly after, with 'X-Men Apocalypse" s Ben Hardy playing drummer Roger Taylor, 'The Tourist" s Gwilym Lee portraying Brian May and 'Jurassic Park" s Joe Mazzello taking the role of bass guitarist John Deacon. Lucy Boynton also stars as Mary Austin, Mercury's muse and lover.