Thanks for your advice pg and Flosmum.
pg - I am over 18 but I am applying for the youth section of this particular agent (16 - 20)
Hm that is a good point about actors headshots needing to show you looking through the lense and not at it. I think my new photos may be slightly more looking 'at' the lense, but the problem is that in terms of what I actually look like (hair, make up, skin, smile, teeth etc) my new ones are SO much better. My old ones really don't look like me, I was wearing a slightly orange-y foundation which makes my skin look weird, my hair was unnaturally straight (I have finally given up the straighteners now

) and I look slightly uncomfortable and I'm not smiling. But I probably am looking through the lense more in those than in my new ones. Now I'm not sure which I should use..
](./images/smilies/eusa_wall.gif)
Both are on my starnow page if you want to see what I mean
Flosmum - Thank you for suggesting that website, I will check it out. I think one is high enough quality to crop, the only problem is is that I'm weaing quite a distracting necklace in it, so I'm not sure it's really suitable for a headshot...
I would ask for the photos sooner, but I don't really want to bother/rush the photographer as he is really good and I know he works really hard!