Title: The Circle (Elfgren and Strandberg novel)
Content:  A film adaptation was to be produced by Filmlance with Levan Akin set to direct and Sara Bergmark Elfgren as script writer. The production was put on hold due to disagreements between the authors and Filmlance. Akin left the project as well. The details remain unrevealed. In April, 2013, Benny Andersson of ABBA announced that he had bought the rights to the film from Filmlance. The film The Circle was shot during March - July 2014 by Andersson's production company RMV Film and was released in February, 2015.
Title: The Circle (2017 film)
Content:  The Circle is a 2017 American techno-thriller film directed by James Ponsoldt with a screenplay by Ponsoldt and Dave Eggers, based on Eggers' 2013 novel of the same name. The film stars Emma Watson and Tom Hanks, as well as John Boyega, Karen Gillan, Ellar Coltrane, Patton Oswalt, Glenne Headly, and Bill Paxton. This would mark a posthumous release for Paxton, who died in February 2017, and would also be the final film of Headly's released before her death in June 2017. The film premiered at the Tribeca Film Festival on April 26, 2017, and was theatrically released on April 28, 2017, by STXfilms and EuropaCorp. It received negative reviews but grossed $40 million worldwide against a budget of $18 million, becoming director Ponsoldt's highest grossing feature.
Title: The Circle (2015 film)
Content:  The Circle (original title: Cirkeln) is a Swedish fantasy film produced and scored by Benny Andersson and directed and co-written by Levan Akin, based on the best-selling novel The Circle by Sara Bergmark Elfgren and Mats Strandberg. It was intended to be the first in an trilogy of films based on Engelsfors, though plans of the sequels have been cancelled. A film adaptation was to be produced by Filmlance in 2013, with Levan Akin set to direct and Bergmark Elfgren as script writer. The production was put on hold due to disagreements between the authors and Filmlance. Akin left the project as well. Benny Andersson's son Ludvig brought the novel to his attention and he bought the rights to produce the film, more faithfully than Filmlance intended, however the film still has significant differences from the original novel. Open castings for young girls who could play the leads were held all over Sweden. The film was screened at the 2015 Berlin International Film Festival, and it was released in Swedish cinemas on 18 February 2015.
Title: The Circle (2017 film)
Content:  On December 15, 2014, Deadline reported that Tom Hanks would star in a film adaptation of Dave Eggers' 2013 novel The Circle, with James Ponsoldt writing and directing. In January 2015, THR confirmed that Anthony Bregman would produce the film through his banner, Likely Story, along with Ponsoldt, Hanks, and Gary Goetzman. On May 11, 2015, it was announced that Image Nation Abu Dhabi would fully finance the film, together with Walter Parkes and Laurie MacDonald, while IM Global would handle international sales. IM GLOBAL later sold the rights to various distributors. In June 2015, Emma Watson was officially set to play the lead role of Mae Holland in the film. In August 2015, John Boyega was added to the cast. In September 2015, Karen Gillan, Patton Oswalt, Bill Paxton, and Ellar Coltrane joined the cast.
Title: Circle (2015 film)
Content:  The script was inspired by 12 Angry Men. Producer and star Nardelli, already a fan of the directors' webseries The Vault, became involved after they pitched the script to him. Pre-production took about three years. Nardelli said he was impressed with the script's ability to cover political, social, and psychological issues. In comparing it to Cube, he said Circle provides more answers and gives more of a definitive ending. Casting for some roles was broad, and others were specific; the intention was always to have a wide cross-section. The writer-directors did not intend for any character to be outright villainous, though several espouse intolerant opinions. Hann and Miscione wanted to address topical issues and provide a cynically-tinged, antagonistic presence for the film. Principal photography began in February 2014 and lasted two weeks. All of the scenes were storyboarded prior to shooting, and the directors tried to be as prepared as possible; regardless, they still encountered problems, as all actors had to be available for every shoot. Nardelli said that the psychological extremes experienced by the cast made it difficult to wind down after shooting.
Title: Circle (2015 film)
Content:  Circle is a 2015 American science fiction psychological horror-thriller film written and directed by Aaron Hann and Mario Miscione. The ensemble cast includes Carter Jenkins, Lawrence Kao, Allegra Masters, Michael Nardelli, Julie Benz, Mercy Malick, Lisa Pelikan, and Cesar Garcia. It was inspired by the 1957 drama 12 Angry Men and was shot in 2014. It premiered at the Seattle International Film Festival on May 28, 2015, before being released to video-on-demand on October 16, 2015. In the film, fifty people wake up in a darkened room, only to find that one of them is killed every two minutes or when they attempt to leave. When they realize that they can control which person is selected to die, blocs emerge based on personal values.
Title: The Circle (Eggers novel)
Content:  A film based on the novel, adapted and directed by James Ponsoldt, was released in April 2017. Emma Watson (Mae Holland), Tom Hanks (Bailey), Karen Gillan (Annie), Ellar Coltrane (Mercer) and John Boyega (Kalden) play the lead roles. The film made over $40 million worldwide but it received negative reviews. The film review website, Rotten Tomatoes, gave the adaptation a rating of 16/100. The Rotten Tomatoes site also offers the following quote as a critic consensus: "The Circle assembles an impressive cast, but this digitally driven thriller spins aimlessly in its half-hearted exploration of timely themes." Some plot points and characters from the book were changed or 
Title: The Circle (American TV series)
Content:  Tim Harcourt is the creative director of Studio Lambert, which produces the British and American versions of the show. Harcourt wondered what a reality show would look like if the people never met face-to-face. He had also been considering the idea of a bird's-eye view-style documentary of an apartment building, seeing into each of their lives. He began to work on The Circle after hearing that Channel 4 was looking for a reality-show format centered on social media.
Title: The Circle (2017 film)
Content:  Principal photography on the film began on September 11, 2015, in Los Angeles, California. On September 17, filming was taking place in Pasadena. Reshoots were done in January 2017.
Title: The Circle (British TV series)
Content:  The first season of the show was produced in London. From the second season of The Circle, production was moved to a new apartment building in Salford, England - this also became the location of production for other versions of the show. The apartment building is always prepared with twelve furnished and ready-to-use apartments for the players to live in. The building also has an exercise room and a rooftop lounge, which are also outfitted with cameras and television screens. One room in the building, called "the testimonial room," is the room players go to after they are blocked to create their goodbye video to the remaining players. On the outside of the building is a large, lit up circle made of a roughly 82-foot (25-meter) diameter aluminum track with LED lights strung through and around the circle. Opposite the apartment building was the control room, which was previously a college campus that became disused. At any time in the control room, there were between twenty and thirty producers and camera operators working, recording, and sending all the messages from The Circle.

Question: Who was the producer of The Circle?
Answer: Jafar Panahi.