Sandra will play a romance author, who discovers that a supposedly fictional city that she had written about is actually real. She and the actor who plays the lead character in her book take a life-threatening journey to find this lost city.
As for Channing, he is currently working on his directional debut in road trip comedy, "Dog".
The "21 Jump Street" star is also set to produce a limited series on tech boffin Elon Musk's private rocket company "SpaceX".
The actor has teamed up with bosses at HBO for the six-episode project, which focuses on Musk ahead of his rocket launch in May, as he selected his team of engineers to work on a remote Pacific Island to build the first-manned "SpaceX" rocket, the Falcon 9.
The show is written by Doug Jung ("Star Trek Beyond") and inspired by Ashlee Vance's book "Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future".