costume trick or treat Alyson Hannigan seahorse
costume Courteney Cox coco arquette tutu brentwood country mart stripes

Alyson Hannigan and her husband Alexis Denisof took their adorable daughters Satyana and Keeva trick or treating in Brentwood yesterday, and the whole family dressed up as adorable seahorses!

The How I Met Your Mother star tweeted, "Gotta go get some glitter makeup for tonight!!!!" before they combed the neighborhood for candy.

Miss Hannigan clearly relishes in motherhood! We wonder if she's giving her HIMYM co-star Jason Segel any tips on helping parent his girlfriend Michelle William's daughter Matilda?

In other Halloween news, Courteney Cox took her adorable daughter Coco door-to-door, and as cute as her little girl is, we can't help but focus on the Friends star's ample cleavage.

Is Miss Cox sexing it up to snag a new man?