The Big Bang Theory has been extended for a further three series, CBS has announced.

The long-running sitcom, which centers on a group of high-functioning science “geeks”, is now due to air until at least 2017.

The most recent series was seen by almost 20 million viewers in the US.

The Big Bang Theory has been extended for a further three series

“The Big Bang Theory is the biggest comedy force on television,” said CBS entertainment head Nina Tassler.

Nina Tassler also hailed the partnership between the broadcaster and Warner Bros, who make the program.

Jim Parsons, who lies at the heart of the show as a scientific genius with negligible social skills, has already won three Emmy Awards for his role as Dr. Sheldon Cooper.

According to Variety magazine, Jim Parsons – along with his principal co-stars – are currently in negotiations to renew their contracts on the show.

The Big Bang Theory, which is currently in its seventh season, was the top-rated sitcom on US television in 2012-13.

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