Halloween in Hollywood is a family affair!

From Jessica Simpson to Zoe Saldana, to the perennial Halloween-ready Burtka-Harris family, celebrities and their kids took the costume-loaded holiday by storm.

RELATED: Jessica Alba, Kim Kardashian, Channing Tatum & More — See Hollywood's Best Halloween Costumes of 2015!

Check out the gallery above to see the best celebrity kids' Halloween costumes of 2015!