Most people don't get a practice run when it comes to marriage proposals. But on NCIS: Los Angeles, Marty Deeks (Eric Christian Olsen) has had about three in the past two seasons alone. So when he finally pops the question to Kensi (Daniela Ruah) for real — like, really for real — it had better be perfect... right?

TVGuide.com caught up with Olsen and Ruah before the NCIS: LA panel at Paley Fest in Los Angeles last week to find out what, for them, would constitute the perfect #Densi proposal.

"Kensi's very demanding, so Deeks has got to up his game," Olsen admits. "When it actually happens, it's gonna have to be good."

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Whether or not we'll see it before the end of this season remains to be seen, but at least the actors have a pretty clear list of dos and don'ts in their heads.

Check out the video to see what else they have in mind, as well as how Ruah's on-screen engagement prep compares to her real-life proposal.

NCIS: LA airs Sundays at 8/7c on CBS.

(Full disclosure: TVGuide.com is owned by CBS.)