Justin Timberlake has penned a touching tribute on social media to mark his wife Jessica Biel's 39th birthday.

The 40-year-old singer, who has been married to the actress since 2012, shared a collection of previously unseen snaps on Wednesday to mark her special day.

In the post, Jessica and Justin enjoyed several cute moments including one snap taken on a beach in which the duo jumped in the air.

Another photograph featured the love birds walking while tenderly wrapping their arms around each other.

Alongside the cute collection of pictures, Justin wrote a heartwarming message as he wished his 'favourite person' a Happy Birthday.

Justin Timberlake's rare sweet message to wife Jessica Biel on her 39th birthday
Jessica Biel turned 39 years old today

"Happy Birthday to my favorite person in the world... the strongest, funniest, best, brightest and most beautiful mom/partner/BOSS there is," he wrote.

Justin added: "I’m lucky to learn from you and laugh with you and celebrate you every day. But, today we do it with!!!!

"Here’s to more slow-mos in the wind, jumping into bushes to save our kid’s toys, and timing out jump pics perfectly..." he said.

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Justin - who shares two children with Jessica - finished his message off with: I [heart]️ U with all that I know.

A number of the couple's fans also took to the comment section under the post to wish Jessica a Happy Birthday.

Justin's post came just a few weeks after the star issued a grovelling apology to his ex Britney Spears on Instagram following criticism on how he treated her during their 2002 break-up.

Justin Timberlake's rare sweet message to wife Jessica Biel on her 39th birthday
Justin shared a cute birthday tribute to Jessica on social media
Justin Timberlake's rare sweet message to wife Jessica Biel on her 39th birthday
Justin called Jessica his 'favourite person' in his touching message

In the post, that Justin shared on February 12, the artist admitted he'd been made aware of the criticism directed at him after the release of Framing Britney Spears.

"I am deeply sorry for the times in my life where my actions contributed to the problem, where I spoke out o f turn or did not speak up for what was right.

Justin Timberlake's rare sweet message to wife Jessica Biel on her 39th birthday
Justin and Jessica have been married since 2012

Justin later added in the post: "I specifically want to apologize to Britney Spears and Janet Jackson both individually, because I care for and respect these women and I know I failed."

After Justin issued his apologetic statement, his adoring wife Jessica wrote back: "I love you," followed by a single red love heart.

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