Right after Miller turned 5 months old, he started sitting up.
As you can see, he's pretty proud of himself. He doesn't get into a sitting position by himself, but once we put him there he'll stay up for... well I don't really know how long because after a few minutes Marshall bowls him over. He is very graceful at falling though, and usually curls up and lands on his side. We don't bother putting pillows around him anymore (I guess that's the ONE positive thing about having carpet in this house). I seem to remember Marshall would always fall right on his face.