The film, from Groundswell and Participant, is McCarthy's follow-up to The Station Agent. The film won raves after its premiere in Toronto and also recently played in Sundance.
Overture will handle the film's US release starting April 11.
The story follows a college professor (Richard Jenkins) whose life is changed when he meets a young immigrant couple in New York City.
K5 previously sold the film to France (TF1), Switzerland (TF1), and Australia/New Zealand (Rialto).
Mary Jane Skalski and Michael London produced, with Omar Amanat, Jeff Skoll, Ricky Strauss and Chris Salvaterra executive producing.
'As one of Halcyon's first major acquisitions I am both thrilled and excited to be distributing this beautiful film in the UK,' said Chris Coen, founder of Halcyon. 'Tom McCarthy is a truly gifted filmmaker with a great sense for character and story; his direction captures the pathos of all the characters in The Visitor with great skill.'
Coen's Halcyon Pictures, known as a production outfit on projects including the US remake of Funny Games, Wristcutters: A Love Story and recently shot Highway 61 starring Tobin Bell, has recently moved into distribution with Halcyon Releasing. The company will launch its theatrical release business with Michael Haneke's Funny Games (in a joint release with Tartan) in April followed by The Visitor in late May.
K5, headed by Bill Stephens, Daniel Baur and Oliver Simon, recently added Joshua Goldin's Wonderful World starring Matthew Broderick and Sanaa Lathan to its EFM sales slate.