Paramount Pictures is distributing the David. O. Russell-helmed drama domestically.
Leo will play the mother of Bale and Wahlberg.
Film, which is scheduled to lense in the summer, tells the story of Boston fighter “Irish” Mickey Ward (Wahlberg) and how he was helped to the world lightweight championship by half-brother Dicky Eklund (Bale).
Leo, whose series “Treme” has been picked up by HBO, will be seen opposite James Gandolfini and Kristen Stewart in the upcoming indie “Meet the Rileys.”