Branagh will be reprising his role of master detective Hercule Poirot from last year's hit "Murder on the Orient Express." He'll also be in the director's chair once again.
If Gadot signs on the dotted line, she'll be playing Linnet Doyle, who is newly married to a former friend's ex-fiancée, according to THR. That love triangle is the center of the Christie novel, which was first published in 1937.
Per THR, Michael Green, who adapted the screenplay for "Orient Express," is writing the script.
An equally star-studded cast will likely be announced soon for the film, which already has a release date: November 25, 2019.