Portrait Backdrops

Does anyone know where I can find some Backdrops that I can add behind my pictures? I am wanting it to look like I had these pictures done in a pro studio. I have some good portraits but I don't like the backgrounds. Thanks for the help.

Make your own or hit some places like flickr.com or morguefile.com

Do you mean digital backgrounds? Or real studio backdrops?

Just make sure you get the backgrounds right in the first place when you are doing the shoot. You can make your own, but for maximum durability and the least effort you can buy AWESOME gear on photoflex.com. With some lights and gel filters you can change the color of the backdrop cloths pretty easy.

If you want to create your own digital versions and edit those in afterwards, just use the filters -> render clouds thingy and change the hue/saturation afterwards for some marble like backdrops. Use quick masks for your subjects, so the backdrop blends in nicely.