I had just put Audrey to bed when I went in to peek at Abigail. It was totally quiet so I expected her to be asleep. Instead I found her on her hands and knees, kind of rocking back and forth. I went to get Chris and when we came back she was sitting up!
She looks just as surprised as we were :)
She's been so close to getting into the sitting position for a while now, but our wood floors make it a bit hard because she's always slipping (which is probably why she will only army crawl!)