Is sleep important while dieting?

Maybe it's because I've been staying up late a lot lately, but when I wake up in the morning, my body feels unusually heavy and tired.

I'm actually paying attention to my exercise and diet, but my sleep schedule is a total mess lol.

I've heard that getting enough sleep is important for dieting. Has anyone actually noticed a difference after changing their sleep habits? I'm wondering if I should start by getting into the habit of going to bed early.