The other two stars --Kunal Nayyar and Simon Helberg--are still in the process of working out a new agreement to return to the CBS show. They are expected to reach an agreement by this week, said the Hollywood Reporter.
The prolonged negotiations for the salary increase of the stars resulted in a brief production delay of the show, which was renewed for three additional seasons during its 10th season.
The trio, who currently earn USD 325,000 per episode, has apparently secured about USD 1 million per half-hour and an increased cut of the show's backend.