Mandy Moore is feeling nostalgic!

The This Is Us star took to Instagram on Thursday, sharing an adorable picture of herself at the age of 15, posing alongside Justin Timberlake. The photo was snapped back in 1999, when the former pop star was touring with *NSYNC.

WATCH: Mandy Moore Shares Throwback Photo of Her Face on a 'Scooby-Doo'-Style Van

In the sweet pic, Moore and Timberlake were dressed in the trendiest pieces from the '90s. While it's hard not to notice their cute ensembles and Moore's platinum blond hair, their smiles were the clear focus of this throwback.

"Summer of 1999. Abercrombie tshirts and bucket hats," Moore, now 32, captioned it. "Opening for this guy and his band. Look at my nervous smile!"

Timberlake was also feeling the social media love on Tuesday, this time from Kevin Hart.

The comedian featured Timberlake's "Let the Groove Get In" song in his "Turn Up Tuesday" video via Instagram.

"It's 'Turn Up Tuesday' people....Get up & get after damn it!!!!" Hart wrote. "I'm sending everybody positive energy!!!!"

"Live Love and Laugh.....Let me see what your #turnuptuesday looks like!!!!" he continued. "Make the world a better place & spread love & joy!!!!"

Watch below:

WATCH: Justin Timberlake Shares the Love After Kevin Hart Does 'Turn Up Tuesday' Dance to His Music