The American superhero film "Avengers: Age of Ultron" has become the fastest-selling foreign film in Korean cinema history, selling over 3 million tickets within four days of its release.

The second installment of the "Avengers" franchise by Marvel Studios opened in Korean theaters Thursday. The action film sold over 1.1 million tickets Saturday alone.

(Marvel Studios/Walt Disney Studios/Motion Pictures)

Its ticket sales Saturday also make it the bestselling foreign film in a single day, beating "Transformers: Dark of the Moon," which sold over 950,000 tickets on its peak day in 2011.

"Avengers: Age of Ultron" is also the most pre-booked foreign film in Korean history, with over 1 million pre-sold tickets.

The film has grossed over 26 million won ($24.2 million) in Korea, according to data from the Korean Film Commission, five days before it hits North American theaters Friday.

The second "Avengers" film is beaten only by homegrown film "The Admiral: Roaring Currents," which currently ranks as Korea's fastest-selling film of all time.

The historical war film which was released last July, surpassed the 3.5 million mark on its fourth day. "The Admiral: Roaring Currents" is also Korea's top-selling film in a single day, with over 1.2 million tickets sold on its peak day.

The blockbuster "Avengers" sequel features Korean actress Claudia Kim in a supporting role and was partially filmed at locations in Seoul.

By Yoon Sarah (sarah356@heraldcorp.com)