Lily Collins will star opposite Zac Efron as the former girlfriend of notorious serial killer Ted Bundy in the thriller “Extremely Wicked, Shockingly Evil and Vile.”

Voltage is handling sales at the American Film Market, which opens Wednesday in Santa Monica, Calif.

The film is told from the point of view of Elizabeth Kloepfer during the multi-year period that Bundy hid his murder spree from his live-in lover, played by Collins.

Collins recently starred in “To the Bone” and “Okja,” and was also nominated for a Golden Globe for best actress (comedy) for her starring role in “Rules Don’t Apply.” She will star as Edith Bratt in Dome Karukoski’s “Tolkien.”

Efron came aboard the Voltage Pictures project at the Cannes Film Festival in May. Bundy was executed in 1989. Shortly before his execution, he confessed to 30 homicides committed in seven states between 1974 and 1978.

Joe Berlinger will direct “Extremely Wicked, Shockingly Evil and Vile.” The original screenplay, written by Michael Werwie, won the Nicholl Fellowship first prize and was featured on the Black List.

“Lily has very quickly distinguished herself as a major talent in a number of diverse roles in recent years,” said Berlinger. “I am really excited about taking Zac and this hugely talented actress to some dark but very human places they may not yet have explored.”

Efron was most recently seen in “Baywatch” and will be appearing in the upcoming James Franco comedy “The Disaster Artist.”

Voltage Pictures and Cota Entertainment are producing, alongside Michael Simkin and Jason Barrett of Efron’s Ninjas Runnin Wild. Ara Keshishian, Nicolas Chartier, and Michael Costigan will be producing via Voltage and Cota. Voltage is fully financing with Jonathan Deckter as an executive producer. Production is set to begin on Jan. 10.