The 21 Cutest Photos of Pregnant Twins Nikki and Brie Bella with Brie's Daughter, Birdie

Surprise: There are two baby Bellas on the way! Twins Nikki and Brie Bella, 36, are both expecting - and revealed to PEOPLE that they're due only a week and a half apart.

"People are going to think that's a joke. We both are shocked," Brie said about getting pregnant at the same time. "People are going to think we planned it, but you can't really plan pregnancy!"

While this is Nikki's first child, motherhood is "something I've dreamed of my whole life," she shared. And she's gotten some great practice being an aunt to Brie's 2-year-old daughter, Birdie.

As the two moms-to-be get ready to welcome their new little ones, we're looking back at all the ways Birdie has helped prepare them for what's next.

"From the moment I saw her I was in love," Brie gushed on Instagram after welcoming daughter Birdie Joe Danielson on May 9, 2017, adding that she is "her Daddy's mini me!!" The Total Bellas star shares Birdie with her fellow WWE pro wrestler husband Bryan Danielson, known professionally as Daniel Bryan.

The retired WWE wrestler has candidly discussed her struggles with postpartum depression after becoming a first-time mom, sharing how she "didn't want to lose the old Brie" but ultimately "really did lose my identity."

With the help of a life coach, she was eventually able to move forward, and encourages anyone "who struggles with depression or does go through some hard times or feels a little lost ... to reach out to someone."

What are aunts for if not spoiling you with limitless affection and dessert? Nikki demonstrated that she's a pro at both back in June 2018, when she and Birdie spent some quality alone time together and things got a little, er, messy.

"How did you trust her with me!" Nikki joked, tagging her sister and brother-in-law on Instagram. "Lol I actually feel like I will make an amazing Mom one day!!!" she added - and we couldn't agree more!

Looks like baby Birdie takes after her parents - she's already mastered the "head lock of kisses!"

While Nikki is expecting her first child with her Dancing with the Stars pro fiancé Artem Chigvintsev, she's already had years of practice being a proud "AUNT 4 Life," often sharing adorable photos of her with Birdie and her other nieces that show she's no stranger to the ups and downs of motherhood.

She and Birdie love reading together, as she's often documented on social media.

Clearly the pair have a very close bond - and a favorite reading position!

In addition to sharing the same birthday, WWE titles, glossy dark hair and adoration for Birdie, the sisters told PEOPLE that they currently "have the same symptoms."

"We have definitely felt better in our lives," Brie said. "We've been super nauseous."

Motherhood changes you, as Brie can attest - and it looks like she's embraced her new morning routine: "Coffee with a splash of toddler toys." Sound familiar? She's termed it the "Mamalatte."

The WWE Divas Champion loves twinning with her baby girl, even though she jokes that Birdie takes after her dad more. "#DaddysMini but I make her my mini," Brie captioned two photos of the pair in pretty patterned ensembles.

"The joys of having a daughter is that you can make them your mini," the expecting mama captioned this playful shot of her and Birdie in matching looks.

Who wore it best? (Trick question - the eyelet lace and ruffled sleeve combo is clearly a hit for both of them, duh!)

Nikki's a natural! During a July 2018 family trip to Lake Tahoe, she and her nieces posed for a cute photo shoot together.

Kids can be a handful - but at least Nikki's already a pro at balancing them!

In addition to lifting them up, the mom-to-be also knows when it's time to get on their level.

In case you couldn't already tell, Brie and Birdie are really big on matching.

Even more than being a mini-me, Birdie really loves Minnie Mouse - and got to meet (and match!) the famous character herself during a trip to Disneyland to celebrate her 2nd birthday. Brie and Nikki, who are no strangers to matching looks themselves, coordinated in black-and-white polka-dot dresses for the occasion.

"[I] can't believe I'm going to be a mom soon," Nikki told PEOPLE. "I'm going to have this person to take care of for the rest of their life and help them do the right things and just show them the way of the world. That's amazing!"

A month after finding out they were pregnant, the sisters celebrated Birdie's last Christmas before becoming a big sister with Nikki's fiancé Artem and Brie's husband Bryan. Here's hoping they all stock up on more matching pajama sets ahead of the holidays this year!

Brie snapped this sweet mother-daughter selfie just a few days before publicly announcing her pregnancy.