Two long-running FOX sitcoms are coming to an end.

"That '70s Show" and "Malcolm in the Middle" will end in May, the network announced Tuesday.

"That '70s Show," which premiered in 1998 and turned Ashton Kutcher, Topher Grace and Wilmer Valderrama into stars, will air its last episode May 18 with a one-hour finale.

"Malcolm" debuted in 2000. It will air its swan song May 14.