According to The Hollywood Reporter, Adams has joined the cast of The Fighter, which also stars Mark Wahlberg and Christian Bale.
The story recounts the life of boxer Mickey Ward (Wahlberg), from his difficult start in the streets of Lowell, Massachusetts to his training with the help of his half-brother and trainer Dick Eklund (Bale) for the World Lightweight Championship in London.
Amy Adams will play a tough barmaid who eventually dates Ward. Melissa Leo will also be in the movie as the mother of the two men.
Filming will begin next month in Lowell, Massachusetts.
Meanwhile, Amy Adams can be seen in the film Julie & Julia in theatres on August 7.