一种说法是 "you've done it" 或 "you've accomplished it"。这个短语的来源源于英语里的 "do" 这个动词，表示完成某个事情。例如：

You've done it! You finally finished that difficult project.

Congratulations! You've accomplished it. You passed your driving test on the first try.

在中文里，可以说 "你做到了！" 或 "恭喜你，你做到了！" 来表达同样的意思。