EntertainmentGeorge Clooney Jokes That the Royal Baby Is 'Stealing My Thunder' at 'Catch-22' Premiere (Exclusive)

George Clooney celebrated his 58th birthday on Monday, which happened to be the same day Prince Harry and Meghan Markle welcomed their brand new bundle of joy, and the handsome star wasn't too thrilled about having to share the spotlight.

Speaking with ET's Nancy O'Dell at the premiere of his upcoming Hulu dramedy Catch-22 in Hollywood on Tuesday, Clooney laughingly addressed the regal birth, and how it affected his own special day.

"It was a little irritating, because that kid really is stealing my thunder!" Clooney joked. "This was my day! I was sharing it already with Orson Welles and Sigmund Freud!"

Are George and Amal Clooney Royal Baby Archie’s Godparents? He Says …

Buzz around Prince Harry and Duchess Meghan’s newborn son, Archie, has had everyone talking since he was born on Monday, May 6, and though the couple have shared his gender, name and photo, there’s at least one thing still left to the imagination: Who are his godparents? Archie’s Photo Album: Prince Harry and Duchess Meghan’s First Royal Baby Chatter that George Clooney — who is a close pal of the couple — and his wife, Amal Clooney, would be the ones to be honored with the title was debunked by the ER alum, 58, on Wednesday, May 8. “Everybody loves their rumors. It’s not true,” George told Extra before he added a nod to Amal, 41, and their 22-month-old twins, Alexander and Ella.

CATCH 22 TV Series 2019 | George Clooney , Hugh Laurie and Kyle Chandler Catch - 22 is described by Hulu as "the story of the incomparable, artful dodger

Hulu's Catch - 22 limited series from George Clooney andGrant Heslov Asked to compare and contrast Hulu’s project to the Mike Nichols’ 1970 movie, Clooney said he and Nichols were “good friends,” acknowledged “we stole a couple things from him along the way,” but noted that the time

Clooney and the as-of-yet unnamed royal baby also share their birthday with rapper Meek Mill, Dancing With the Stars host Tom Bergeron, former U.K. Prime Minister Tony Blair, silent film star Rudolph Valentino, NBA all-star Chris Paul and singer-songwriter Bob Seger.

While Clooney feigned disappointment over sharing the b-day attention, the actor -- who was one of the celeb guests as the Royal wedding when the Duke and Duchess of Sussex tied the knot almost a year ago -- said he was overjoyed for the new parents.

"I'm very happy. They're a lovely couple, so it's very exciting," Clooney marveled.

However, despite having two children of his own -- 1-year-old twins Alex and Emma, whom he shares with wife Amal Clooney -- the actor said he doesn't feel it's his place to give the Duke and Duchess, or anyone else for that matter, advice on anything.

George Clooney Jokes It 'Kind of Hurts' That the Royal Baby Wasn't Named After Him (Exclusive)

The actor opened up to ET about Prince Harry and Meghan Markle's new son and his regal name.

“’ Catch - 22 ′ is a rare story that has withstood the test of time, not only as a literary masterpiece, but as a story that still resonates Clooney will star in the role of Colonel Cathcart. The series is being eyed for an early 2018 shoot. Clooney ’s producing partner Grant Heslov will also direct a portion of the series.

Catch - 22 is not a hospital drama, but a World War II-era satire. Both men will be playing executive officers of the army in question. Yet if Yossarian makes any attempt to excuse himself from the perilous missions he’s assigned, he’ll be in violation of Catch - 22 , a hilariously sinister bureaucratic

"I don't give advice, I'm 58," he quipped. "At 58 you just go, 'Ugggh.' I just walk with a walker everywhere I go."

While Clooney may joke about slowing down now that he's in his late 50s, there's certainly no sign of that when it comes to his career. Especially with his new Hulu series Catch-22, on which he serves as an executive producer, director and star.

Explaining what drew him to the project in such a big capacity, Clooney explained, "I thought it was a really good script and I thought it was a really good time."

"I think it's always a really good time to talk about the absurdity of war," he added. "I don't think that ever gets old."

While satires about the morality of military action and combat may interest a certain demographic, Clooney also joked that he wanted to broaden the show's appeal so he made sure to include a lot of "male nudity" and shirtless men.

"What happens is, no one asks me to take my shirt off anymore, so I made them take their shirts off!" Clooney said with faux-indignation in his voice.

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A catch - 22 is a paradoxical situation from which an individual cannot escape because of contradictory rules or limitations. The term was coined by Joseph Heller, who used it in his 1961 novel Catch - 22 . An example is: "How am I supposed to gain experience [to find a good job] if I'm constantly not hired

George Clooney exec produces and directs “ Catch - 22 ,” a limited series set to premiere May 17 on Hulu starring Christopher Abbott. And in the years since Hollywood last took a run at the book, American culture has shifted in such a way that the novel’s flaws — especially its blatant misogyny

Whether you're interested in a searing dark comedy about the surreal absurdity of combat or just want to see shirtless men, fans can catch Clooney's new series Catch-22 when it premieres on Hulu on May 17.