Celebrity Neil Patrick Harris Wishes His Twins Happy 6th Birthday with Darling Instagram Photo By Kelsey Glein Kelsey Glein Twitter Kelsey Glein is a Seattle-based writer and editor who covers all things fashion, beauty, and pop culture. She was previously the Digital Editor of InStyle and is currently a Social Media Manager at a cosmetics company. InStyle's editorial guidelines Updated on October 12, 2016 @ 07:45PM Pin Share Tweet Email Photo: D Dipasupil/FilmMagic It's official: Neil Patrick Harris and David Burtka have the cutest 6-year-old twins in Hollywood. The star took to Instagram today to wish his and his chef husband's adorable kids Harper and Gideon a happy 6th birthday, and the photos he shared are completely darling. The 'gram features two pictures of the kindergartners, one which shows the pair of cuties going down a slide together at the playground and another that features the duo zooming down a blow-up waterslide on their stomachs. "Gideon and Harper turn 6 today! Happy birthday to these big, bold, brave, bright, beautiful bundles of bountiful blessings. Boom. #balliteration @dbelicious and I love you kids SO much! #grateful," Patrick Harris captioned the snap. But this is far from the first time that the proud dad has posted a cute shot of his little ones. Last month, he 'grammed a sassy image of Harper and Gideon striking a fierce pose on their first day of kindergarten and wrote: "Kindergarten fits these two well. #firstdayofschool." Neil Patrick Harris Is Using "Jedi Mind Tricks" to Get His Kids Excited for a Family Halloween Costume VIDEO: Neil Patrick Harris's Cutest Family Instagrams We can't wait to see what they do next.