Lucille Ball
In 1951, Ball was important in the creation of the television series I Love Lucy. The show ended in 1957 after 180 episodes. Then, some small changes were made to the series format. The time-length of the series was changed from 30 minutes to 60 minutes. The first program lasted 75 mins. Some new characters were added. The story was changed. After these changes, the program was renamed The Lucy-Desi Comedy Hour. It was shown from 1957 until 1960.