HBO has released a trailer for he BBC2 network’s Alfred Hitchcock-based tele-pic The Girl, premiering on HBO on Oct. 20. Directed by Julian Jarrold from a script by Gwyneth Hughes, the film examines the iconic filmmaker’s obsessive relationship with Tippi Hedren.

According to Hughes’ research, which includes interviews with a now 81-year-old Hedren and surviving members of Hitchcock’s film crews, Hitchcock grew obsessed with the alluring blonde starlet—then an aspiring fashion model—while taking her under his wing during the making of The Birds and Marnie.

The Girl stars Sienna Miller (G.I. Joe: Rise of Cobra) as Hedren, Toby Jones (The Hunger Games) as Hitchcock, Imelda Staunton (Harry Potter and the Deathly Hallows) as his wife Alma Hitchcock and Penelope Wilton (Shaun of the Dead) as his assistant Peggy Robertson.

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