Zoe Saldana's inspiring gym selfie

The actress posted this inspiring image on her Facebook page with the caption, "Almost there! It's been difficult but so rewarding. I feel strong. All it takes is determination! Mommies we can all do it, damn it!!!"

Saldana is sharing honest updates on Facebook about the highs and lows of getting back to the gym after a baby.

"Your body changes dramatically, inside and out. You grow in places you never knew you could, and you are tired beyond belief."

"Everything from my thyroid to my platelets crashed . . . my body was really bent out of shape after the boys were born. Bouncing back feels impossible, but I know it is important as a woman, and now a mummy, to not give up."

"I know many of you have gone through this or are going through it as we speak. Let's do it together. Let's talk about it, hear each other out, and seek advice when we need it."

"I'm not gonna lie — it is slow, painful, and frustrating. But it is worth it."