Rachel from 'Big Brother' --

Wannabe Bikini Model

8/11/2010 7:15 PM PDT BY TMZ STAFF
Back before she became the most hateable person in the "Big Brother" house -- Rachel Reilly was a wannabe bikini model for Hawaiian Tropic ... and the footage has finally hit the web.

Rachel Reilly Big Brother - Bikini Video
Rachel -- who's a favorite to get evicted from the house this week -- doesn't do any talking in this clip.

And really ... it's better that way.