Adrien Brody -- I May Be 160 Lbs, But I'll Defend My Girlfriend's Honor (VIDEO)

Adrien Brody might not seem like a tough guy, but he was quick to get in the face of a couple of guys he thought were disrespectful to his girlfriend.

The Oscar winner and his girl were at the Cosmopolitan Hotel in Vegas Thursday night when we're told 5 guys starting hitting on her.

Adrien's GF got real uncomfortable so he stepped up and confronted them. There was pushing and shoving, but eventually hotel security calmed the situation down.