The celebrated artists chatted with ET on the red carpet at this year's star-studded ceremony in Las Vegas.
The pair cuddled up together as they posed for photos outside the Michelob ULTRA Arena at Mandalay Bay in Las Vegas on Thursday before they spoke with ET's Denny Directo about their relationship and how special it feels to have each other's support.
"You know, something like this, if you are able to share it with people that you love -- I'm here with him, with my sister -- to me, this makes it even like the emotion bigger," Rosalía shared. "Everything feels much better, and I enjoy it more."
The 30-year-old songstress -- who is nominated in several categories at this year's ceremony -- also reflected on how their relationship influences their music.
"I think definitely, definitely. I think that we share a lot of time together so that always gets reflected somehow, in what we do," she explained.
For Alejandro -- who is also nominated in numerous categories this year -- sharing the moment with his ladylove is "really special."
"I think this thing doesn't happen often," he said of their romance. "We're really happy, we feel grateful, and we just enjoy the moment."
He also credited Rosalía for his on-point red carpet style, explaining that he always lets her weigh in on what he's gonna wear for these kinds of events.
"She has a good eye, and I always let her, all the time, decide," he said, adding with a laugh, "I don't want any problems!"
Apart from possibly walking away with new trophies, both artists are also set to perform during Thursday's big show.
The 23rd Annual Latin GRAMMY Awards aired Thursday, Nov. 17 at 8 p.m. ET/PT on Univision. Check out the night's full list of winners here!