Blake Lively and Ryan Reynolds' secret baby name revealed! Deadpool star shares VERY unusual Nordic moniker of their fourth child 16 months after birth

Ryan Reynolds finally revealed the name of his fourth child with wife Blake Lively - 16 months after they welcomed the baby.

The movie star, 47, was on stage at the Deadpool & Wolverine premiere in New York City on Monday night and specifically thanked wife Blake, 36, and their four children - naming them all.

The fourth baby's name has been a secret since they welcomed their child in February 2023.

Ryan revealed that their fourth child's name is Olin.

The name Olin is of Nordic origin, and it means ancestor's heir or to inherit. 

It is typically a male name however Blake and Ryan have not yet revealed the gender of their fourth child. 

Ryan and Blake are also parents to three daughters; James, nine, Inez, seven, and Betty, four. 

'I want to start by saying thank you to my wife Blake, who is here. I want to thank my kids James, Inez, Betty, Olin, who are here,' Ryan said on the stage at the premiere on Monday night, according to Variety. 

'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 lives,' he said.

Blake looked amazing in a dark red jumpsuit for the premiere on Monday night -  channeling Ryan's Deadpool character. 

She paired the low-cut one-piece with her blonde tresses pulled back in a ponytail. 

Blake posed up a storm with her good friend Gigi Hadid, who channeled Wolverine in yellow look - consisting of a crop top and skirt - by Miu Miu. 

Blake and Ryan looked at each other lovingly as they stayed close to each other at the premiere. 

The stars never officially revealed she had given birth to their fourth child, and instead shared a snap of herself wearing fitted jeans and a top and no baby bump on February 12, 2023.

Blake hinted too in the caption that she had her baby by writing: 'Puppy Bowl Sunday 2023. Been busy,' she wrote. 

Blake announced her fourth pregnancy on the red carpet in September 2022 while at the 10th Annual Forbes Power Women's Summit in New York City.

The Gossip Girl star also shared a slideshow of snaps of her during her pregnancy in 2022, with her best friend Taylor Swift also making an appearance.

Blake and Ryan first met in 2010 on the set of their film Green Lantern. 

They started dating the following year, in October 2011.

The lovebirds tied the knot on September 9, 2012 in South Carolina, welcoming their first child James in December 2014, their second child Inez in September 2016, Betty in October 2019 and their fourth child in February 2023.