EXCLUSIVE: Grace Gummer (Love Story) has inked a deal to join Dakota Fanning in Apple TV‘s new thriller series from Alex Cary (A Spy Among Friends, Homeland) and Sony Pictures Television.

In the untitled series, Fanning stars as an undercover Treasury agent in a multi-billion dollar international conglomerate, with world-changing political and criminal tentacles, who becomes conflicted between her mission and a belief that her principal target, the heir apparent to all that corrupt power, is at his core a good man and worthy of her love.

Gummer will play the series regular role of Juliana, the oldest child of Stellan Skarsgård’s Brant, who heads up the conglomerate. As previously announced, Daryl McCormack is also set to star.

Apple’s thriller series is exec produced by Cary, who also serves as creator and showrunner under his overall deal with Sony Pictures Television and his FLW Productions banner. Julie Gardner (Lady in the Lake, Doctor Who) executive produces for Bad Wolf America, alongside and Dakota and Elle Fanning, Brittany Kahan Ward of Lewellen Pictures (Margo’s Got Money Troubles, The Great), and Kari Skogland (Smoke, The Handmaid’s Tale), who also directs.

Gummer recently garnered praise for her turn as Caroline Kennedy in FX’s hit limited series Love Story: John F. Kennedy Jr. & Carolyn Bessette, created by Connor Hines and executive produced by Hines and Ryan Murphy. She and her co-stars were honored with the Ensemble Tribute at the third annual Gotham TV Awards on June 1st.

Other notable TV credits for Gummer include USA’s Mr. Robot, Peacock’s Dr. Death, several of Ryan Murphy’s American Horror Story seasons (most recently, American Horror Story: Delicate), and HBO’s The Newsroom. In film, she recently co-starred opposite Jeremy Strong and Jeremy Allen White in Scott Cooper’s Springsteen: Deliver Me from Nowhere.

Gummer is represented by CAA and Anonymous Content.