Credit: Instagram

We love Kim Richards's lovely golden locks on Real Housewives of Beverly Hills. But have we now seen the last of them?

Kyle Richards posted a photo to Instagram of herself and Kim together on September 21 in which Kim has dark hair. Say what?!

Does this mean Kim - gasp! - dyed her hair? The show already has a slew of brunettes - so maybe we've just added one more to the list. 

Uh, fear not. It looks like this was just a chance for a little dress-up. "My sister @KimRichards11 and I playing around with wigs #happybirthdayKim #sisters," Kyle captioned the pic. Awww, too cute!

We love that Kim and Kyle were able to spend some quality time together, and that they're capable of getting a little silly. As we all know, Kim and Kyle have a long history in the acting field, so it's no surprise that they'd have a wig or two lying around.

As for Kim's special day, she turned 49 on September 19, and she posted a pic from her birthday of herself getting dinner with her kids. So it looks like Kim had a wonderful day!

By the way, is it just us or does Kim look a like a dead ringer for Lisa Vanderpump with that dark wig on?  

Source: Instagram