Here's the story
of a lovely lady
who was bringing up three very lovely girls
All of them had hair of gold
like their mother
the youngest one in curls

It's the story 
of a man named Brady
who was busy with three boys of his own
They were four men
living all together
yet they were all alone

'Till the one day
when the lady met this fellow
and they knew that it was much more than a hunch
that this group must somehow form a family
that's the way we* all became The Brady Bunch

The Brady Bunch
The Brady Bunch
that's the way we* became The Brady Bunch

*Note: During the first season, "we" was originally "they" since the theme
was sung NOT by the Brady Kids, but by "The Peppermint Trolley Company."