Long-running US TV shows Malcolm In The Middle and That '70s Show will come to a close in May.

American broadcaster Fox will bring the Frankie Muniz-fronted comedy to an end on May 14th after seven seasons, and That '70s Show faces the final curtain four days later after eight years on US screens.

Entertainment President Peter Liguori has confirmed Fox is in talks with Ashton Kutcher and Topher Grace with a view to returning for That '70s Show's finale.