Your resume and cover letter impressed the hiring manager enough that you've landed an interview. Naturally, you do all the right things to prepare. You study up on all the trick interview questions and prepare stand-out answers to come off as intelligent and confident.

You really, really want this job. But of course, you will act professional and composed throughout the interview process so that you come off as non-desperate-sounding as possible. Desperate people don't get job offers.

Or do they?

According to Suzy Welch, the former editor-in-chief of Harvard Business Review and bestselling business book author, you should reveal your vulnerability in this process. It'll work well in your favor. In the last few minutes of your interview, she recommends you say: "I really want this job." Welch explained her reasoning in a video for CNBC: Make It.

"Too blunt for you? Too desperate? Do you think it will sound awkward? All legitimate concerns," Welch says.

But, according to Welch, the pros outweigh the cons. Just because it's a job interview doesn't mean you can't be candid. In fact, being candid goes a long way in this somewhat stuffy and buttoned-up process.

First off, it's way more memorable than the standard (and extremely forgettable) "thank you for the opportunity" line. Hiring managers know it takes guts to speak up and express how badly you want the job.

"Coming right out and saying 'I really want this job' shows a refreshing level of sincerity," Welch says. This is an important character trait that's difficult to truly gauge in job interviews when everyone is on their best behavior.

It also shows you're confident -- but not so confident that you lack humility. You're confident enough in your skills and expertise, but are humble enough to acknowledge they're considering other qualified candidates for the position.

And saying, "I really want this job" is a simple, yet effective way to show how excited you are about the position. Hiring managers look for more than someone who's qualified for the job. They want to hire for fit, too. They certainly don't want to hire someone who's "meh" about the role. When it comes down to two equally qualified candidates, they'll be more likely to extend the offer to the more enthusiastic one. That's the person who is going to show up to work and bring their A-game.

"Make your case. Give it your all. And somewhere near the end of the process, make sure they know how you really feel," Welch says. ​