Highly anticipated film Yalghaar starring Shaan Shahid and Adnan Siddiqui is headed to its final phase of production, with more than half of the film's shooting reportedly complete.

Screenshot of one of the scenes in 'Yalghaar'. — Photo courtesy: Yalghaar's official Facebook page

Written, directed, and produced by Dr Hassan Rana – who produced blockbuster Waar – the film is set to be the most expensive movie in the history of Pakistani cinema with an estimated budget of Rs 50 crore, a press release stated.

Read: Hassan Rana talks Yalghaar, Shaan and future of Pakistan's cinema.

Based on a true story of a successful military operation conducted in Swat district, Yalghaar follows the lives of the officers and soldiers involved in the battle against terrorists.

The lead role of a Colonel in the Pakistan Army is being played by Shaan Shahid.

Image from the storyboard showing Shaan— Photo courtesy: Yalghaar's official Facebook page

Humayun Saeed, Gohar Rasheed, Sana Bucha, Adnan Siddiqui, Ayub Khoso, Bilal Ashraf, Ayesha Omer, Sikander Rizvi, Umair Jaswal, and Armeena Khan also feature in the war movie.

BTS: Shaan, Aamir Querashi, Umair Jaswal and Bilal Ashraf. — Photo courtesy: Yalghaar's official Facebook page

Talking to Dawn.com, Shaan Shahid's publicist, Syed Noman Nazir revealed details about the film:

"Shaan will be playing the protagonist with Sana Bucha acting beside him. There is a whole team of SSG commandos and Shaan, Uzair Jaswal, Ayub Khoso are all part of the team. Humayun Saeed will be seen in a negative role."

BTS: Adnan Siddiqui in "Yalghaar"— Photo Courtesy: Yalghaar's official Facebook page

He further added that, "Half of the film has been shot in Karachi and Tarbela. The two legs of the movie left to shoot will be shot in Swat and Islamabad; the climax of the operation will be shot in Swat."

The movie's is expected to be released sometime in 2015. The first trailer of the film is expected to released January 2-15.