'The Big Bang Theory' stars Kaley Cuoco, Jim Parsons and Johnny Galecki are said to be collectively negotiating a new deal which would see them earn $500,000 an episode.
The three leads in the sitcom - who play Penny, Sheldon and Leonard respectively - are reportedly seeking a big pay rise as the show continues to be a huge success.
According to reports on Deadline.com, the trio are negotiating their deals collectively - as they have done since 2010 - and all want a considerable raise on their current salary of $325,000 per episode.
The duo - who became show regulars in 2010 after starting off as guest stars - currently earn between $20,000 and $30,000 for each episode, but this could double.
Their pay is then expected to increase every year and could peak at $100,000 an episode by the end of their contracts.
It is claimed Kaley - who previously dated 'Man of Steel' star Henry Cavill - was ''overwhelmed'' by her love life being so public, despite her success in the sitcom.
A source previously said: ''She just got overwhelmed with the very public Superman relationship. She's not used to that much attention and chaos in her life.''
The pair recently enjoyed their first visit to the interactive experience in New York.
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