Back in love!

Patrick Dempsey celebrated his 51st birthday on Friday, Jan. 13 — and his wife, Jillian Fink, couldn't help but give her handsome hubby a sweet shoutout on social media to celebrate!

"Happy birthday to my hubs ? @patrickdempsey and all of the wonderful people of Milan who helped to celebrate!" the makeup artist captioned an adorable black and white Instagram snapshot of the once-estranged duo hugging.

The pair perviously announced their split after 16 years of marriage in January 2015, but they reconciled later that year. In November 2016, Patrick and Jillian called off their divorce for good.

Before the news the couple was officially back together was confirmed, the former Grey's Anatomy star revealed the adorable reason why the pair squashed the idea of a split.

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"Our marriage was not something I was prepared to let go of," the actor revealed in a previous interview. "I didn't feel like we had done all the work. And we both wanted to do that work. That's where it started."

"You can only do one thing at a time and do it well," Patrick added. "I [learned] to prioritize. Our union has to be the priority. I wasn't prepared to give up on her and she wasn't either. We both wanted to fight for it."

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Patrick and Jillian in 2002.

The couple — who tied the knot in July 1999 — also wanted to keep it together for their three kids: daughter Tallula, 14, and twin sons Sullivan and Darby, both 9.

"It's always destabilizing when you're potentially breaking up a family or you have a big section of your life that's ending," he said. "Jill and I decided it was time to work on our issues and improve. We wanted to be role models for our kids like, okay, if you have differences, you can work them out."

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"You've got to keep at it," Patrick concluded. "You've got to communicate, and stay open and not get lazy. And not give up. And [have] lots of sex!"

We're so glad to see the happy duo looking happier than ever!

Click through the gallery below to see Patrick and Jillian’s sweetest moments together!