Jessica Alba's daughter is a teenager and mom's 'mini' in heartfelt birthday post

Jessica Alba's oldest child is now a teenager – and the resemblance between them has fans doing a double take.

In a heartfelt post to Instagram Monday, the actress and entrepreneur praised her daughter, Honor, who turned 13. 

"Yes you are way taller than me already, which you love to remind me of on the daily. You have a heart of gold, you are filled with compassion, you are wicked smart, silly, hilarious, and so kind," the proud mama wrote alongside photos of her newly-minted teenager.

She added: "I hope your teens are everything you hoped for and more, remember to soak up every moment. I love you with my whole heart and soul."

The Honest Company founder and her producer husband Cash Warren share three children: Honor, 13, Haven, 9 and Hayes, 3.

Alba's celebrity friends joined in on the post with empathy and congratulations.

"OMG!!!!!!!!! She is your Mini you.. gorgeous girl," wrote actress Fernanda Romero. "I can’t imagine the emotions you are going through. They grow too fast."

"She’s all grown up! Wow. Beautiful," wrote Maria Menounos. 

The 40-year-old appeared on "Red Table Talk" in October and talked parenting with hosts Jada Pinkett Smith, her daughter Willow Smith and "Gammy" Adrienne Banfield-Norris.

Alba admitted she put cameras in her children's rooms because she was constantly worried about them.

"I wake up, like 30 seconds to one minute before my kids wake up, from either a nightmare or they’re going to the bathroom," she said on the show. "And I tell Cash, 'Did you hear that?’ And every time, he’s like, 'There’s nothing. It’s in your head.' "

She said having eyes on her kids provided relief. 

"Now I spy on them. Now I have cameras in all their rooms so I actually can really justify what the heck is going on," she said. "But I really thought I was losing it, until I started surveilling them."

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Alba noted she was on borrowed time with the camera in her then-12-year-old daughter's room. 

"Honor was like, 'Mom, I’m 12 now. Don’t you think it’s awkward?' " Alba said. "And I’m like, 'Well you shouldn’t be doing anything in your bedroom. You have a whole closet to dress in, and you have your bathroom for your private time. So what are you doing in your room? What, you think you’re going to sneak somebody in?' "

"Somehow I’m still getting away with it," Alba added, "but I think this might be the last year.”

Contributing: Erin Jensen