Biel wrote the sweet message to her husband on Instagram one day after the pair stepped out in New York City

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Jessica Biel is celebrating the man of her “blue ocean dreams.”

On Thursday, the Sinner actress wrote a sweet message to husband Justin Timberlake in honor of his 38th birthday. Along with the note, Biel, 36, shared a goofy underwater photograph of the couple smiling next to each other.

“Since the days of embarrassing pink ruffled bikinis and underwater photo shoots, you have been infusing my life with so much joy and laughter that I blame YOU for my smile lines. 😊” Biel lovingly began the post.

“But I wouldn’t trade them for the world. I wear them with pride knowing that I am the luckiest human around to have the honor of hearing your jokes, your words, your voice, every day of my life,” she continued.

Justin Timberlake and Jessica Biel
| Credit: Jessica Biel/Instagram

To finish the birthday post, Biel wrote, “Happy birthday to the man of my blue ocean dreams. I love you.”

Just a day earlier, the couple, who are dad and mom to 3½-year-old son Silas Randall, headed out in New York City on to watch a performance of To Kill a Mockingbird on Broadway.

Celia Keenan-Bolger (left) and Jessica Biel
| Credit: Bruce Glikas/WireImage

After the show, Biel and Timberlake greeted the cast, including actress Celia Keenan-Bolger, backstage and posed for photographs.

The cast appeared to be thrilled by the couple’s presence, with many of them beaming in the shots. Biel and Timberlake also took time to shake hands with several of the actors before calling it a night.

Justin Timberlake with the cast of To Kill a Mockingbird
| Credit: Bruce Glikas/WireImage

The celebration happened a day early to accommodate Timberlake’s work schedule, who is currently wrapping up his Man of the Woods national tour, and had a show slated on his birthday.

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Thursday night’s performance at Madison Square Garden was originally scheduled for October, but Timberlake was forced to postpone it until his birthday due to his ongoing bruised vocal cord recovery.

The *NSYNC alum previously had an operation to remove his throat nodules — benign growths on the vocal cords — in 2005.

Jessica Biel with the cast of To Kill a Mockingbird
| Credit: Bruce Glikas/WireImage

Their night out on the town got off to a particularly slow start, however, with Biel falling fast asleep in the car.

Timberlake captured her snooze in a video he posted on his Instagram account, with the playful caption “Gotta work tomorrow for my bday so wifey really going all out tonight…”

In the clip, he quietly sang himself “Happy Birthday” before panning the camera to a resting Biel. Eventually, he gets louder and wakes Biel up, the 7th Heaven alum locking eyes with his phone with a smile.

“I’m just preparing for our big night out,” she teased. “Just preparing.”

Laughter seems to be a big part of Timberlake and Biel’s marriage, which began when they said their “I dos” in Puglia, Italy on Oct. 19, 2012. In fact, it’s part of what brought them together.

As Timberlake revealed in his first book, Hindsight: & All the Things I Can’t See in Front of Me, back in November, the two met at a party in Hollywood and immediately connected over their shared sense of humor.

When I met Jess, it was undeniable how beautiful she is,” the “SexyBack” singer wrote. “I made some sort of sarcastic comment, really dry. Nobody got it except her. She laughed, and I noticed, all of a sudden, and in the way where you wonder if a person’s like you, if they have a very dry, dark sense of humor, too.”

Though he didn’t ask for her number that night, Timberlake kept thinking: “I’m kind of really interested in that girl. There was just something about that girl. Kind of interested in that girl. Goddamn it.”

NBC's "70th Annual Primetime Emmy Awards" - Backstage
Justin Timberlake and Jessica Biel
| Credit: Todd Williamson/NBC/NBCU Photo Bank via Getty

Timberlake continued, “I had to psych myself up. I had to remind myself that I was me — giving myself a pep talk, shadowboxing with myself, rubbing my own shoulders.”

They saw each other again when she came to a show during his FutureSex/LoveSounds tour. Per the book, he offered her and her friends a ride on his tour bus, which is when he finally asked for her number and they started talking.

“Then the Golden Globes came up, and that’s when we planned on seeing each other,” Timberlake wrote. “We were both still seeing other people, keeping ourselves safe from getting hurt, from really putting ourselves out there. It took a bit for both of us to admit to ourselves that we were really, really into each other.”

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After he came back from touring abroad they spent a month together. Then they decided to be exclusive, Timberlake wrote in Hindsight.

“We’ve had a lot of unforgettable times,” Timberlake said. “She’s become a huge influence on my life, and I have such an admiration for her, especially seeing her as a mother now.”

He added, “But I had admiration for her before. She’s a very good writer. She’s a poet. She’s a tremendous actor. She’s funny. Very funny. And she’s one of the most patient people I’ve ever met… She changed me. She changed my life.”