Browns QB Cody Kessler's Sexy Model Fiancee

Betcha didn't think you'd be jealous of a Cleveland Browns player ... but that's all about to change.

Here's Valeriya Kuklishyna -- the Ukrainian model Cody Kessler proposed to last weekend in Cleveland -- and considering the Browns' 0-13 record ... she just might be the highlight of the season.

Check out the pics ... she's hot enough to melt all the lake-effect snow in The Land.

Congrats on the engagement, kiddos!!