Here are another batch of Facebook Cover Photos (the first batch can be found at Facebook Cover Photos 1 and the third batch at Facebook Cover photos - batch 3). This is a miscellaneous batch and includes a number of Alex Kingston/River Song covers as requested. Right click and open in new tab/window for the full size 851 x 315 versions. Feel free to add text, adapt etc - and if you'd like to request specific actors/actresses, characters or moments then please get in touch.
Sources - screencaps are mostly mine but thanks to Alex-Kingston.org for use of a few caps.