The couple tied the knot in 2014, but have been together for 13 years.
Happy anniversary, Neil Patrick Harris and David Burtka!
The couple tied the knot three years ago on Wednesday, and Harris couldn't help but celebrate with a sweet tribute to his husband.
"I got married three years ago today. Thanks, David, for choosing me. For challenging me. For creating a family with me. For being a safe space that I can call home. And for your bountiful love," the actor wrote alongside a throwback shot from their wedding day. "Happy Anniversary. ?@dbelicious."
Harris and Burtka married in September 2014 in Italy, but have been together for 13 years. The couple are parents to twins Harper and Gideon, who turn 7 years old next month.
See the sweet way Harris and Burtka celebrated 13 years as a couple in the video below.