Ruthie from 7th Heaven does Maxim

First Topanga, now this!!

Ok. We thought Beverley Mitchell having a baby made us feel old, but check out her former “7th Heaven” costar Mackenzie Rosman!

Mackenzie played little Ruthie Camden on the hit series, but now 23 years old, she’s baring it all (well, most of it) for Maxim magazine.

Photographer Carlos Nunez posted this pic of the scantily clad actress on his Instagram account — and needless to say it’s a far cry from how we remember the youngest Camden girl.

Rosman is following in the footsteps of her former costar Jessica Biel, who famously posed topless for Gear magazine while still on the show — and created all kinds of drama.