Remember, even though they had separate beds, Lucy and Ricky still managed to have a baby They named him after his father-'Little Ricky,' they called him.

Who woulda thunk that it would be Little Ricky?

(And you didn't even mention "Big Ricky", just "Little Ricky".)

In fact, Patterson's role was so popular (as well as useful to the writers of the series) that she continued in the role for three more years as the babysitter for "Little Ricky".

In the I Love Lucy episode "The Girls Go Into Business" (1953), Lucy encourages Little Ricky to "Tanny up!"

Lucy finds out she was expecting Little Ricky on the Season 2 episode "Lucy is Enceinte."

Ethel and Fred Mertz (Vivian Vance, William Frawley) arrive and drop off favors for Little Ricky's fifth birthday party, which is scheduled for Saturday.

Desperate to avoid disappointing Little Ricky, Lucy decides to dress up as Superman herself.

A boy named Keith Thibodeaux (using the stage name Richard Keith) was later cast to play 6-year-old Little Ricky.

Keith Thibodeaux (b. 1950), billed as Richard Keith, would later become "Little Ricky."