Having run for a total of fourteen seasons, "The Adventures of Ozzie and Harriet", which averaged 29–30 episodes per season, was at one point the longest-running live-action American television sitcom. On April 1, 2017, "It's Always Sunny in Philadelphia" was renewed for a thirteenth and fourteenth season, and then through an eighteenth season on December 10, 2020, which will lead to its breaking the record for longest-running live-action scripted comedy series, but those seasons amount to only around a third as many episodes of "Ozzie and Harriet".