Jessica Biel shared a cute throwback picture of her and her husband, Justin Timberlake, on Instagram to honor his 38th birthday.

The picture was of the couple underwater, and Biel accompanied the hilarious snap with an even more adorable caption:

"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," she wrote.

"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, e.ver day of my life."

She wrapped up the post with:

"Happy birthday to the man of my blue ocean dreams. I love you."

Biel and Timberlake have been married for over six years, and they seem to be still going strong.