Who are all of your teammates in Dragon Age: Origins and how do you get them?

I'm wanting to get every character and don't know how to do it. If you could tell me who the characters are and where to find or get them, I would appreciate it. Thanks.Who are all of your teammates in Dragon Age: Origins and how do you get them?
the best thing to do is check out this site for the guide on the game,it will tell you all you need to know.hope this helps.http://guides.gamepressure.com/Who are all of your teammates in Dragon Age: Origins and how do you get them?
Just keep progressing through the game normally and you'll start your adventure (after Ostagar) with Alistair, Morrigan, and the dog.

Here's what I remember (Name/Location)

Leliana - Lothering
Sten - Lothering
Wynne - Mage Tower
Zevran - Random encounter
Ohgren - Orzammar
Shale - Stone Prisoner DLC

Leliana is hard to miss, just enter the Lothering bar and you'll get her.

Sten can be missed entirely and never gotten again. Talk to him in his prison cell, and offer to release him. Go to the chantry and speak to the revered mother with Leliana in your party and ask for her to release Sten. Leliana will vouch for you, and Sten will be yours.

Wynne - Simply go to straight to the mage tower and she will offer to join you (If you are willing to help her.)

Zevran - After some story progression, you WILL encounter Zevran while trying to travel to your next destination. After the encounter ends, Zevran asks to join you.

Ohgren - He comes to find you as you embark on a quest called "A paragon of her kind." Which is needed to progress the game.

Shale - Is available to find if you have the DLC. It's pretty straightforward but the quest segment can be difficult, so be prepared.

There is a special "hidden" party member available to get, but I'll let you figure that one out. (It's hard to miss, and is an option much later in the game.)