Neil Patrick Harris / Instagram 1 / 20
Neil Patrick Harris / Instagram 1 / 20

Cutest family ever? Neil Patrick Harris and his fiance David Burtka have continued their costume-themed tradition with their adorable twins -- Harper and Gideon, 3. The "How I Met Your Mother" star and his family were spotted dressed as the Alice in Wonderland characters in Studio City, Calif., on Saturday, Oct. 19. 

PHOTOS: Celebrity LGBT allies

Harris, 40, and Burtka, 38, went as Tweedledee and Tweedledum as they dressed their beautiful daughter as Alice and Gideon as the March Hare. The couple was photographed wearing their adorable outfits as the "Smurfs" actor held on to Gideon and Burtka carried Harper on his shoulders.

PHOTOS: Hollywood's out and proud celebrities

This marks the third year in a row that the family went for a film theme. Last year, they went as characters from "The Wizard of Oz;" Harris dressed as The Tin Man, Burtka as The Scarecrow, Harper as Dorothy and Gideon as The Cowardly Lion.

PHOTOS: Neil Patrick Harris' adorable family!

In 2011, the family took a trip to Neverland! The family went as characters from Peter Pan; Harris went as Captain Hook, Burtka as Peter Pan, Harper as Tinkerbell and Gideon went as his famous dad's sidekick, Smee.

MORE ON WONDERWALL:

The complete guide to celebrity Halloween costumes

Who said it? Celeb parenthood edition

Neil Patrick Harris' cutest daddy moments