US TV
The 44-episode pickup will take the show to a total of 493 episodes and 22 seasons, making it the longest-running series in primetime TV history.
Gunsmoke - which was on air for 20 years - currently holds the record, but Fox's renewal of The Simpsons gives it the lead.
The Simpsons, which launched in 1990, is currently in its 20th season.
More: US TV, 2009-10 US TV Season
Tube Talk
The Best TV Couples: Friday FiverTube Talk celebrates Valentine's Day by reminiscing about the best TV couples.
2012-13 Season
John Stamos to star in 'Little Brother'The former Full House actor will star in the comedy pilot Little Brother.
US TV Interviews
'Celebrity Apprentice' Donald Trump Q&ADonald Trump teases the new season of Celebrity Apprentice.
US TV Ratings
'Vampire Diaries' soars to 3m for The CWThe Vampire Diaries and The Secret Circle perform well for The CW.
