Actors' appearances change immensely over the course of long-running series, and that especially goes for child actors. With a cast full of characters going through puberty and adolescence, The Brady Bunch almost looked unrecognizable after it aired for five seasons.

We've compared the show's first episode, "The Honeymoon," and its final episode, "The Hair Brained Scheme," to see just how much the actors really changed throughout the series.

Spoiler alert: They changed a lot. 

Let's start with the adults:

Mike Brady

Robert Reed didn't appear in the last episode of the series because he didn't like the plot. Instead, his last appearance is in the penultimate episode, "The Hustler." 

Carol Brady

Carol didn't have the trademark mullet during the show's last season. Florence Henderson also wore a wig during the first season.

Alice Nelson

It looks like producers let Alice's hair go gray by the time the series wrapped.

Now, on to the kids:

Greg Brady

Greg's orange hair was temporary in the last episode, but we'd be fools to leave it off this list. 

Marcia Brady

Marcia didn't have a big part in either the first or last episode. 

Peter Brady

Peter's voiced changed as much as his appearance over the course of the show's five seasons. 

Jan Brady

Jan looks almost unrecognizable!

Bobby Brady

The same goes for Bobby, who sported noticeably lighter hair by the time the show wrapped.

Cindy Brady

During the show's first season, producers made Susan Olsen bleach her hair so she could better match her onscreen mother. 

Oh, and don't think we forgot about Cousin Oliver:

The extra addition to the Brady clan only appeared in six episodes, starting with season five's "Welcome Aboard" and ending with the series finale.