I'm a big River fan and loved her story arc. I can't wait for River's return in this years Christmas special.
From the BBC on September 2nd:
Alex Kingston returns to Cardiff to reclaim her role as Professor River Song for the highly anticipated 2015 Doctor Who Christmas special, part of BBC One’s essential seasonal viewing.
Award winning Alex Kingston comments on her reappearance, “To be honest, I did not know whether River would ever return to the show, but here she is, back with the Doctor for the Christmas special. Steven Moffat is on glittering form, giving us an episode filled with humour and surprise guest castings. I met Peter for the first time at Monday’s read through, we had a laugh, and I am now excited and ready to start filming with him and the Doctor Who team. Christmas in September? Why not!”