Mad Men's Aaron Staton will be joining the cast of Ray Donovan for season 3, Deadline reported on March 26.

Season 3 Will Not Be About The Donovan Family 

The actor will be playing Dr. Donellen, a complex high school teacher, who has something of a tragic past and will be the kind who uses tough love with his students. Staton's will be a "heavily recurring role" according to the report. No other details have been revealed about the character or how he will tie into the plot of the Showtime drama.

The major, and most talked about, cast addition to the show has been Katie Holmes. Recently, new behind-the-scenes stills featuring Holmes and Schreiber filming for season 3 of Ray Donovan were revealed.

Behind-the-Scenes Stills Introducing New Character Revealed

The Daily Mail revealed that Holmes will be playing the part of Paige, "wealthy and shrewd businesswoman who uses the 'fixer' services provided" by Ray Donovan (Liev Schreiber). Paige will be the daughter of another new character, Andrew, who is a moneyed Hollywood producer. Ian McShane will play the role of Andrew. 

Other guest stars include The Bold and the Beautiful alum Jack Wagner, playing the part of Sandy Patrick, "an obnoxious and self-important game show host." It was previously reported that Cheryl Ladd, best known for her role as Kris Munroe in the Charlie's Angels TV series, will also be guest starring and according to Variety, Wagner and Ladd will be sharing screen time. Ladd is also set to portray a game show hostess, Tina Harvey. Both have been cast opposite each other for their character arcs.

Season 3 of Ray Donovan will premiere on July 12 at 9 pm on Showtime.

Watch the promo for season 3 here:

Tags: Ray Donovan showtime Mad Men television