The countdown is on!

Teresa Palmer is just days away from welcoming her second child, and the pregnant actress bared her baby bump on Instagram to prove it.

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"Some magic here waiting for the littlest love to join our tribe," she captioned the sweet pic with her two-year-old son Bodhi. "#40weekstoday What are your birthday guesses?"

Teresa, 30, is expecting a baby boy with husband Mark Weber, and the Australian beauty has been documenting her pregnancy on social media and her Your Zen Mama blog.

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"And just like that my heart grew bigger," she wrote. "Welcoming baby number 2 in to the family. Can't believe our little Bodhi is going to be a big brother!"

Too cute! For more adorable photos of Teresa's growing belly, check out the gallery below!