Naomi Watts is officially off the market.

The Mulholland Drive actress announced in a sweet Instagram message that she married Billy Crudup.

Naomi captioned her June 10 post, "Hitched," alongside a photo of her looking lovingly at Billy as they posed in front of what appeared to be a Manhattan courthouse. In the same snapshot, the Watchmen actor was smiling from ear to ear and wrapped his arms around Naomi.

As for their wedding attire, the newlyweds dressed to impress.

The King Kong actress wore an intricately floral embroidered bridal gown by Oscar de la Renta, which perfectly coordinated with her white bouquet that was plucked straight from "the deli," she revealed in an Instagram Story. For the groom's part, he looked dapper in a navy blue suit with a white button-down.

After Naomi shared the news, she and Billy received an outpouring of love from their famous friends in the comments section.

Naomi's ex, Liev Schreiber, who she shares kids Sasha, 15, and Kai, 14, with, also commented on her marriage news. 

"Congratulations!!!" he shared. "Gorgeous!!!"

Billy is also a dad to son William Atticus Parker, 19, whom he shares with ex-Mary Louise Parker.

Back in April, engagement rumors swirled around after the actress was spotted wearing a massive diamond ring on that finger. When asked about her relationship milestone during a Today appearance, she played coy.

"My eye is hurting," Hoda Kotb said. "There's a big glint coming from some ring over here. It just struck me. But it's beautiful." 

The actress cheekily responded, "Oh, the brain fog!"

Naomi and Billy's low-key wedding comes as no surprise, as they've been keen on keeping their relationship private. In fact, the two, who played spouses on Netflix's Gypsy, first sparked romance rumors in July 2017 and have since kept their love life under wraps.

But the couple isn't the only newlyweds to have a surprise wedding. Keep reading to see who else got secretly hitched.

Naomi confirmed she tied the knot with the actor in a June 10 Instagram, sharing behind-the-scenes photos of their surprise wedding.

The celebrity hairstylist and The White Lotus star confirmed that they tied the knot in an April 26 Instagram, sharing photos of Kim Kardashian and Shania Twain at their wedding.

Jessica Alba and Cash Warren, who share three children, married in 2008 when she was expecting their first child, daughter Honor. "We eloped and I think I was nine months pregnant!" she told Glamour U.K in 2022. "It wasn't planned."

The actress continued, "It was literally, 'Honey, do you have anything to do this morning?' And he was like, 'No.' So I said, ‘Should we go to the courthouse and get married?' And he was like, 'Yeah.' And then I said, 'Can we get waffles afterwards because I have a doctor's appointment? Will you come to my doctor's appointment?' And that's how it happened!"

"Today my love, @juannycostello, and I are celebrating 6 months since 'I do!'" Kimberly Perry shared about her secret wedding to Johnny Costello on Instagram on Dec. 18. "On June 17th we hit the road from LA to Las Vegas in a black corvette and got married at midnight. It was wild and wonderful and reminded me all over again that God is the most glorious creator and the master of the most beautiful blueprint for our lives! I love you Johnny and can't wait for forever."

Two months after announcing their baby news, the Casper actress revealed that she and the celebrity hairdresser tied the knot!

The actress announced she wed Robert Sweeting in a heartfelt Instagram post on Sept. 12, writing, "For some of us, it can feel like we spend our whole lives waiting for our special someone. My heart, my love — I'm so happy my life started last year with you. You're the best thing that ever happened to me."

The WandaVision star subtly revealed she and the musician had tied the knot by referring to him as her "husband" during an interview with Kaley Cuoco for Variety.

In May 2021, a source revealed to E! News that the This Is Us star privately married the actress after about a year together.

The pop star exchanged vows with the real estate broker during an intimate May 2021 ceremony held at her home in Montecito, Calif. 

A source told E! News, "There were only about 20 guests, close family and friends. It was a beautiful day and very romantic. Everyone is happy for them. It was perfect and just what Ari wanted."

The action star wed his girlfriend in Las Vegas in February 2021. He wore a Tom Ford tux and she wore a handmade Japanese bridal kimono. Cage and Shinto exchanged traditional Catholic and Shinto vows.

The Jonas Brothers singer and Game of Thrones actress secretly tied the knot in a small ceremony in Las Vegas shortly after the 2019 Billboard Music Awards. They had a second, larger wedding with more friends and family in France months later.

The Transparent co-stars eloped in July 2018—and the bride had a last-minute fashion emergency. After seeing that the actress wore a periwinkle dress on her big day, a commenter wrote she had "loved the white one, too."

"I destroyed it with makeup right before the wedding," she wrote in the comments section. "Thank God I packed this!"

The supermodel and former Project Runway host secretly obtained a marriage license and wed the German rocker in early 2019. 

"The House That Built Me" singer revealed in 2019 that she and NYPD officer Brendan McLoughlin tied the knot. E! News confirmed that they got married on Jan. 26, 2019 in Davidson County, Tenn. "In honor of Valentine's Day I wanted to share some news. I met the love of my life. And we got hitched!" she wrote on Instagram. "My heart is full. Thank you Brendan McLoughlin for loving me for.... me."

After a 10-year relationship, the pop star and Australian actor exchanged vows in an intimate wedding ceremony held in Tennessee over Christmas 2018. Cyrus wore a satin Vivienne Westwood gown for the top-secret affair. The pair has since divorced.

The HGTV star and her boyfriend of just over a year wed at their home in Newport Beach, Calif. in Dec. 2018. They split less than two years later.

The Morning Joe co-hosts tied the knot at the National Archives in Washington, D.C. on November 24, 2018. Vanity Fair reported that they got married alongside the Declaration of Independence and Constitution. 

Multiple outlets reported that the two wed in August 2018. Young confirmed the following October that Hannah is his wife.

The supermodel and her main man hosted an intimate ceremony in upstate New York just three months after announcing their engagement in 2018. 

The Oscar-winning actress and her new husband celebrated with friends and family at a secret wedding in Saint Lucia Preserve in Carmel, Calif. Swank called the ceremony "timeless" and "a dream come true."

The Golden Globe-winning actress married her longtime beau in August 2018, according to Vogue Paris. The House of Cards star and Saint Laurent VIP relations manager reportedly tied the knot in a low-key ceremony at an unknown location. 

The Golden Globe winner secretly married Mount Eerie frontman Phil Elverum in early July 2018 in the Adirondacks. They split in 2019. 

The Migos rapper publicly proposed to the "Bodak Yellow" performer in October 2017, but it was revealed nine months later that the pair had actually tied the knot in a no-frills ceremony in September of that year. 

The Gone Girl actress and star of Robin Thicke's "Blurred Lines" music video married the actor at a New York courthouse in February 2018. The news came just weeks after it was reported she was no longer living with her then-boyfriend, music producer Jeff Magid.

The Trainwreck actress and comedienne married her beau, a chef, at a private home in Malibu in February 2018 and just two days after she went public with their relationship.

In late 2017, the singer and actress announced she and her boyfriend eloped in Hawaii. 

The longtime couple tied the knot in a wedding ceremony held at their house in Topanga, California, near Los Angeles in 2017. 

The actor said in mid-March 2017 the two had eloped the previous weekend. E! News had confirmed in September that the two were engaged. Two months later, Seyfried's rep said the actress was pregnant with their first child.

The TV personality said in March 2017 he and his longtime partner had wed in January.

The Fast & Furious star announced in February 2017 he had tied the knot on Valentine's Day, posting a pic of him and his wife, who he did not name. He later confirmed a report that said she is Samantha Lee, a New Jersey social worker. Tyrese and Samantha split in 2020.