Many thanks to Betty for sending in the info and link.
Actress Veronica Ferres has joined the Siberia cast and is the actress in the photos with Keanu that have appeared on social media today. In an interview that she did with LRM that was posted back on April 19, she said the following when asked about upcoming projects:
I just finished a movie with Fox International, which is a comedy. They wanted me to do a movie with Keanu Reeves called Siberia and another one with Sir Ben Kingsley called Death of an Author.