Ashlee Simpson gave us all a very special treat on Instagram this Thursday: she introduced us to her baby girl, Jagger Snow Ross! Although the couple welcomed baby Jagger back in July [2], this marks the first time we've seen her. Ashlee captioned her new snap, "Jagger Snow Ross!! We love her so much!!! She is beyond everything!!! I have the best baby daddy @realevanross In the world. Love you." Things have been pretty quiet since the birth, but we did spot Ashlee out celebrating Evan's birthday [3] in late August. Evan also shared picturesque new wedding snaps [4] recently, so it's clear the two are up to their ears in bliss. Keep your fingers crossed for even more pictures up baby Jagger in the months to come.