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Webster's age span throughout the series run was five to eight years old. In real life, Emmanuel Lewis was ages 12 to 17 throughout the series run. The finale premiered just one day after his 18th birthday.
Emmanuel Lewis' mother became aggravated with cast and crew members who continually picked him up to carry him to filming. Eventually, the head of Paramount Television had to tell them to stop.
The change of the title to "Webster" caused a major rift between Alex Karras, Susan Clark, and ABC. The show originally focused on an ensemble cast, but Emmanuel Lewis' character quickly became the primary focus.
The show was originally to feature only George and Katherine, portraying a newly-married celebrity couple attempting to settle into normal domestic life. After Emmanuel Lewis was signed to star in an undeveloped and undefined series for ABC, the network decided to combine the two.
Alex Karras (George) and Susan Clark (Katherine) were married in real life. Alex Karras is now deceased; he died on October 10, 2012 from kidney failure.