UK Teletext has some exclusive stuff on The Simpsons TV series and movie:
The producers of The Simpsons plan to make it the longest-running prime-time entertainment show in US TV history.
Actress Marcia Wallace, who plays teacher Edna Krabappel on the animated comedy said: "It would be fitting for us to hold that record."
The series begins its 18th season in the US next month. The current record holder is Gunsmoke, the western which ran for 20 years until 1975.
Animated comedy The Simpsons has definitely been renewed until its 19th season, but Marcia Wallace believes the end is not in sight for the show.
"There was talk the show was going to end a few years ago, but I don't hear that any more," the actress, who plays teacher Edna Krabappel, said.
"Everyone is just as enthusiastic now as they were when it started. It is part of popular culture, so we all want to do 20 years at least... and more."
The movie version of TV's The Simpsons is shrouded in such secrecy that much of its cast don't know what it's about.
Marcia Wallace, who plays teacher Edna Krabappel, revealed: "I've only seen bits of the script that have Edna in it - nothing else. I've never known the producers to be so secretive."
Wallace revealed the movie features songs, but not from Edna. "I recorded one, but it's just been cut," she said.