The Guardians of the Galaxy star took to Instagram on Monday to share a few sweet snapshots of her twin boys -- Bowie and Cy -- in celebration of their special day, and reflected on how their presence has forever altered the course her life for the better.
"Happy Birthday Bowie and Cy! Today, November 27th will always be the happiest and scariest day of our lives," Saldana captioned a snapshot of her twins, whom she shares with husband Marco Perego. "On a day like today, three years ago our lives changed forever. We went from being two to four in just 2 minutes. Even though your arrival was early and with a couple of scary hiccups you have been the light of our lives ever since we learned of your presence within us."
"Your strength, determination, curiosity and kindness humble us every day," the captioned continued. "Thank You for choosing us to guide you through the first stages of your purposeful path in life."
The 39-year-old action star -- who welcomed her third child with Perego in February, son Zen -- wrote that both of her sons are "meant for greatness, and by the grace of God your father and I will make sure you grow up to be exceptional men that will bring healing, wisdom, happiness, and change into this world."
The actress admitted that they have "a big task ahead of [them]," but they are committed to raising "healthy, empathetic and selfless men."
"We hope to never let you down," she wrote. "And please continue to teach us how you need to be loved, seen, spoken to, taught, encouraged, protected- all the things you need to thrive and make your life meaningful."
She also shared a sweet photo of Perego playing under what looks to be a sheet fort with Bowie and Cy.
Earlier this year, Saldana revealed that she'd recently paid special tribute to her loving husband -- although not with an Instagram pic but with a tattoo of his face on her ribcage! Check out the video below to hear more.