Photoshop Joining Two Images

Hi, I am new to this and I would like to know how i can join two images toghether. both are protraits and have drastically different backgrounds. basicly I took a group photo and 1 person was missing. so I took a picture of her in a different setting with the correct pose. now I would like to add here to the rest of the group....

appreciate any help on this.

thanks,

john

1. you can use the extract filter to get the person only then drag it to the group

2. you can use the pen or lasso tool to trace the outline of a person, make the outline a selection(if you're using a pen tool), invert the selection(ctrl>shift>i) or if it is already inverted, delete the background then drag the person into the group

hope this help

i did this and added the extra person to the picture, but now how do I make it look like the additional person belongs there

You would have to play around with the brightness and contrast.