Major casting news for The Money, HBO’s David Milch drama about wealth and corruption among the super elite. Billy Magnussen has been cast as a series regular, in the role of Greg Castman — the middle, and favorite, child of mogul/patriarch James Castman (Brendan Gleeson), who wields power and influence to expand his media empire and control his clan. Rosemary Harris has been cast in the recurring role of Ellen Knox, the sharp, fearless, and funny mother of James Castman’s wife Ruth (Laila Robins). Mamie Gummer will recur as Tricia Castman, who comes from old New York money and is married to John Castman (Patrick Kennedy), James and Ruth’s dutiful son and key lieutenant in Castman’s empire. Ray Liotta will recur as wealthy, entitled, untouchable Wall Street tycoon George Archer. Ruth Negga becomes a series regular, playing Erin Foley, the stylish, no-nonsense senior news editor who reports to John Castman. Morgan Spector also signed on as a series regular, playing James Castman’s trusted associate Sidney. John Carroll Lynch will recur as Robert Harris, the CFO of the parent company of Castman’s many holdings. And Tracee Chimo will recur as a private eye Jane Mulvaney, who works closely with Gordon McCarren, a reporter for VistaCorp’s New York Herald who’s job is on the line and is desperate to confirm a hot scoop. Nathan Lane was signed last month to the McCarren role. Milch is writing and executive producing with exec producers Art Linson and John Linson. Justin Chadwick is directing the pilot and co-exec producing. Frank Rich also exec produces; Eric Roth and Sarah Caplan are co-exec producing.

Last week, Boardwalk Empire alum Kennedy, Dominique McElligott and Robins were cast in the series. McElligott will play James’ beloved daughter Katherine Castman.