The stars of hit US sitcom The Big Bang Theory could be in line to become TV’s best-paid actors after finally signing a three-year contract extension.

Jim Parsons, who plays lead character Sheldon, Johnny Galecki (Leonard) and Kacey Cuoco (Penny) have all agreed new deals with Warner Bros TV, putting an end to the brief delay in filming of new episodes for the eighth season.

According to the Hollywood Reporter, the multi-award winning show’s stars had each been seeking $1m per episode in a deal that would make them the highest paid actors on US television.

Parsons, Galecki and Cuoco have been negotiating with the studio together and insiders have said it’s ‘likely’ that a $1m per half-hour deal has been signed.

Fellow actors Simon Helberg (Howard) and Kunal Nayyar (Raj) are still involved in negotiations but are expected to confirm their return for the eighth season shortly. 

The comedy – which follows a group of science boffins – is the most watched show in the US, with an average audience of 23 million last year.

Earlier this year the show was renewed for a further three series, meaning it will be on our screens until 2017 at least..

The Big Bang Theory airs on weekdays on E4