Bitsie Tulloch, Sebastian Roche, Jack McBrayer and Paula Marshall will star in Christopher Gorham’s “We Love You, Sally Carmichael,” Variety has learned exclusively.

With shooting starting this summer in Utah, Gorham is making his directorial debut with “Sally” and will play an author who is ashamed to have secretly written the “Siren” series of young adult romance novels that chronicle the love story between a young woman and a merman. The novels have been written under the pen name, Sally Carmichael.

Tulloch (“Grimm”) will play a single mother to a “Siren” superfan. She was recently featured in “Portlandia” and Will Smith’s “Concussion.”

Roche, best known for “The Originals” and “The Man in the High Castle,” has been cast as an international movie star who develops an obsession with the author that threatens to unravel his carefully crafted life of anonymity.

McBrayer is joining “Sally” as the author’s kind, yet duplicitous, publisher. McBrayer is best known for “30 Rock.” Marshall, who worked with Gorham on “Out of Practice,” has also joined the cast as another publisher.

“Sally” is being produced by Adam Abel through his production company, Go Films, and executive produced by Andrew Smith, Brian Garlock and Daryn Tufts and David Nibley of Flinch Films.

Variety reported in April that Gorham would make his directorial debut on “Sally.”