Ryan Reynolds has finally revealed the name of his and wife Blake Lively’s fourth child — Olin!

The “Deadpool & Wolverine” star made the sweet announcement during the movie’s premiere at the Lincoln Center in New York City on Monday.

Reynolds, 47, revealed his youngest child’s unusual Nordic moniker while speaking to the crowd ahead of the hotly-anticipated screening.

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“I want to start by saying thank you to my wife Blake, who is here,” he said onstage. “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.”

“I love that my entire family is here,” he added.

The couple are also proud parents to daughters James, 9, Inez, 7, and Betty, 4.

The “Red Notice” actor and Lively — who tied the knot in September 2012 — seemingly confirmed the arrival of their fourth bundle of joy in February 2023.

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At the time, the “Gossip Girl” alum, 36, sported a blossoming baby bump in a series of photos shared on social media.

“Puppy Bowl Sunday 2023🥘 🍲 🥧 been busy,” she captioned some snapshots of her family’s Super Bowl bash.

And it doesn’t seem like the pair have ruled out expanding their brood just yet.

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On Monday, the “Free Guy” actor revealed he wanted as many children “as possible.”

“As many little heartbeats as possible, just running around, wrecking stuff in the house. I love it. Let’s have more,” he told E! News.

But the pair likely won’t be asking their pal Taylor Swift to babysit because, according to Reynolds, she charges a hefty fee.

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“The cost of that is … I believe the accountant said, ‘Cost-prohibitive,‘” he joked to the outlet. “But I think what he meant was, ‘Cost-insane-what-are-you-doing-I’m-no-longer-you’re-accountant.’”

Still, it’s been a smooth-sailing journey into parenthood for Reynolds… for the most part,

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In April 2023, the actor admitted that becoming a party of six has been a surprisingly smooth transition.