Neil Patrick Harrisand his husbandDavid Burtkajust took their love to new heights.

The couple celebrated their 15th anniversary on Monday night with dinner at Manhatta, a fine dining restaurant with breathtaking views perched 60 stories above lower Manhattan.

Harris also dedicated a sweet post to Burtka, 43.

“My first date with David was 15 years ago today, and we’ve been nearly inseparable ever since,” he wrote. “I’m so, so grateful to this gorgeous man for giving me his heart, his shoulder, his strength, his lust, his laughter, his joy. He’s an actor, chef, author, singer, producer, and the most wonderful, selfless parent I’ve ever seen. A sextuple threat, if you will. And I most certainly will. Happy 15th Anniversary, @dbelicious. You keep making all my dreams come true.”

Burtka shared then-and-now photos of the pair in honor of the milestone.

“15 years ago Neil Patrick Harris and I met on the street,” he revealed. “From that day he has made my world a better place. Thank you @nph for the best years of my life. I can’t believe how fast 15 years have gone. Happy Anniversary! I can’t wait to keep on laughing, playing and loving for years to come. #15yearchallenge #lifeisaparty.”

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Harris and Burtka, who are parents to 8-year-oldfraternal twinsHarper Grace and Gideon Scott,tied the knotin September 2014 in Italy.

Speaking to PEOPLElast month, Burtka revealed that he decided to write hisfirst cookbook,Life Is A Party: Deliciously Doable Recipes to Make Every Day a Celebration, to share a window into his life at home with Harris and the twins. The book, which hits shelves April 16, is a spinoff from his 2016 Food Network special,Life’s a Party with David Burtka.

Since Harris was busy with a project in Vancouver, the author said he engaged his children to help with taste testing.

“It was lots of fun, but the kids would ask me, ‘tangerine chicken, again?’ ” he said with a laugh. “And ‘how many different ways can we eat lemon sole, dad?’ “

source: people.com