Though she has yet to confirm whether she's expecting, Saldana, 36, is letting her body do the talking, rocking revealing ensembles as she promotes Guardians of the Galaxy.
The buzz began earlier this week, when the actress posted an Instagram of her dressed in a tight pencil skirt that accentuated her midsection during a press day.
And at the space superhero flick's premiere Monday night, she wore a sparkly, sheer Louis Vuitton number that once again emphasized what looks like a growing baby belly.
Saldana married Italian artist Marco Perego last summer. This would be the first child for both.
"We found each other, and it was that desire and not that necessity that put us together," she told PEOPLE of her husband over the weekend.
Her rep has not commented on the pregnancy rumors.