Pants seem alright, but maybe a little wonky because your knees are locked. I'd also get a heavier tie with less of a sheen. The knot seems a bit small for the collar (try a pratt or half windsor). And button your jacket when standing, you'll look better
I like that you are wearing brown shoes when everyone else went with black. Can't really tell much about the quality of the shoes from the picture, but nice brown shoes with that suit will probably make you memorable (in a good way) at such events.