Even the 'How I Met Your Mother' star has fanboy moments.
SO cute.
Harper and Gideon are the cutest Marilyn Monroe and James Dean we've ever seen!
Neil Patrick Harris and David Burtka have the cutest children EVER.
Lookin' sharp, kiddos!
Kelly Ripa, Bethenny Frankel and Jenna Dewan Tatum also shared first day memories.
Neil Patrick Harris' kids are out of control cute.
Gideon and Harper also enjoy other hobbies like flower arranging and meditation.
The actor and father of two shared his happy day with the people he loves the most.
Harper and Gideon are ready for kindergarten!
The 'How I Met Your Mother' actor shared a pic of his kids after their graduation.
The actor attended Sunday's event with his husband, David Burtka.
The actor seemingly sported the new look for his role in 'A Series of Unfortunate Events.'
The former 'Dancing With the Stars' host tells ET she would love to fill Michael Strahan's role on the morning talk show.
