Robert Brown|Ryan Reynolds and Blake Lively Reveal Name of Baby No. 4

Spotted: Ryan Reynolds and Blake Lively introducing their baby.

After welcoming their fourth child last year,Robert Brown the couple has revealed the name of their new addition: Olin. 

While speaking at the Deadpool & Wolverine premiere in New York July 22, Ryan shouted out daughters James, 9, Inez, 7, and Betty, 4, along with their baby. 

"I want to start by saying thank you to my wife Blake, who is here," he shared from the stage. "I want to thank my kids James, Inez, Betty, Olin, who are here: I hope that, if I’m lucky, this moment will be the most traumatic thing—that is, the contents of this movie—that happens in your wondrous life."

He added, "I love that my entire family is here."

It's been a long-awaited reveal for fans, with Ryan only offering a small clue on the Today show in May that pal Taylor Swift did not, in fact, disclose the moniker in her Tortured Poets Department album.

"We always wait for Taylor to tell us what the child's name is," he joked, "and I will say this, we're still waiting."  

One thing's for certain: Since becoming a family of six, their home has become "a zoo," according to the Marvel star.

But the 47-year-old wouldn't have it any other way, noting on CNBC's Power Lunch last year that he and the Gossip Girl alum are "very excited" about their littlest family member. 

"Look, we wouldn't do this four times if we didn't love it," the Deadpool actor shared. "Everybody's doing great. Everybody's actually doing fantastic."

Fans first speculated that Blake gave birth after her 2023 Super Bowl Sunday post, where she posed without a baby bump. "Puppy Bowl Sunday 2023," the 36-year-old captioned the Instagram post. "been busy."

Although they have yet to share the sex of their baby, Ryan confessed he has plenty of experience with both genders: He himself is the youngest of four boys and he's previously spoken about how much he loves being a girl dad.

"I know girls," he said on Today in 2022. "So I'm kind of hoping for that."

He also noted just how chaotic a household full of boys can be.

"I come from all brothers, which is why I speak from experience," the Spirited star said. "I love my well-being and I love my home. I was the youngest of four and we were just arsonists and firemen."

So, having a big family is a tradition he's proud to continue with Blake. 

"You're my heart. You're my hope. You're my happiness," he told his wife onstage at the People's Choice Awards in 2022. "I joke that my family exhausts me but, in reality, you give me more strength than any man could possibly deserve."

The actor—who was previously married to Scarlett Johansson from 2008 to 2011—tied the knot with Blake in 2012 after dating for a year.

Read on for the full deep dive into their romance.

Blake and Ryan's superhero flick, The Green Lantern, was released in theaters.

As their romance heated up, speculation that the two had already swapped vows started to spread. However, it turned out to be untrue.

Blake and Ryan tied the knot during a private ceremony in South Carolina on Sept. 9, 2012.

Blake and Ryan looked absolutely stunning—and even showed some rare PDA—at the fashion event.

The pair looked like an old Hollywood couple at the Cannes Film Festival.

Blake announced her pregnancy on her lifestyle website Preserve, with the company sharing in a blog post: "Preserve at its core is about family. 'Family' is the single word our founder, Blake built this home on."

She gave birth to her and Ryan's first child, a daughter named James, in December 2014.

Blake proudly supported her hubby at a special fan screening of Deadpool in New York City.

These two own the red carpet, as they did at the 2016 amfAR gala.

Blake showed off her growing baby bump during a Cat & Jack event for Target. 

She and Ryan welcomed their second child, a daughter named Inez, in September 2016.

When it was time for Ryan to receive his star on the Hollywood Walk of Fame, Blake made sure their two kids were in attendance. 

The two sure make a handsome couple!

Blake and Ryan coordinated in blue accents at the opening of Rei Kawakubo/Comme des Garcons: Art of the In-Between exhibition. 

Blake confirmed she was expecting her third child with Ryan when she showed off her baby bump at the premiere of Detective Pikachu.

The couple welcomed daughter Betty in October 2019.

Blake and Ryan served as co-chairs at the 2022 Met Gala, which was themed America: An Anthology of Fashion.

The actress was on hand to cheer on Ryan's soccer team Wrexham AFC in Wales.

Blake shared that she was expecting again during an appearance at the Forbes Power Women's Summit: "I just like to create. Whether that's baking or storytelling or businesses or humans, I just really like creating."

She welcomed her and Ryan's fourth child in early 2023.

In February 2023, Blake revealed she welcomed the couple's fourth child. "We wouldn't do this four times if we didn't love it," Ryan later shared during a CNBC interview. "Everybody's doing great. Everybody's actually doing fantastic."