US TV giant Fox has announced that it has given the green light for the 18th and 19th series of 'The Simpsons'.
Variety reports that the decision means that 'The Simpsons' will be on US TV screens up to and including 2008.
The move also means that the series is the longest-running comedy by far in Fox's history.
The 400th episode of 'The Simpsons' will air in season 18, with its tentative US broadcast date 20 May 2007.
