According to The Hollywood Reporter, Frank Langella has joined the cast of 'Muhammad Ali's Greatest Fight,' alongside Christopher Plummer, on HBO. Plummer has signed on to play Supreme Court Associate Justice John Marshall Harlan II. Langella will step into the role of Chief Justice Warren Burger.
Langella won his first Tony Award for his performance in Edward Albee's Seascape and 1975 and was nominated for another for what may have been the performance for which he was best 
known for in the early part of his career: the title role of the 1977 Broadway production of Dracula. He then appeared on Broadway in such plays as Sherlock's Last Case, Strindberg's The Father (winning a Drama Desk Award), Match (Tony Award nomination), and Fortune's Fool, for which he won a second Tony Award.
He was cast as Richard Nixon in Peter Morgan's Frost/Nixon, which received enthusiastic reviews during a run at the Donmar Warehouse and Gielgud Theatre in London before moving to New York's Bernard B. Jacobs Theater in April 2007, culminating in Langella's third Tony Award. He reprised the role of Nixon in the 2008 film Frost/Nixon, directed by Ron Howard.
Plummer has been nominated for an Academy Award this year for his role as an aging father who reveals his homosexuality to his son in Mike Mills' feature film, 'Beginners'. Plummer has won two Tony awards in his career, one for his performance in BARRYMORE and the other for his lead role in CYRANO.
The film has yet to cast the title character, but will be helmed by Stephen Frears. Read the Hollywood Repoter article here.
