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Allison Williams' Son Designs Halloween Costumes
18 Oct
Summary
- Williams advises parents to plan Halloween costumes early but buy closer to the date.
- Her son, Arlo, has decided he wants to be an astronaut for Halloween.
- Arlo is also designing costumes for his parents, a decision Williams calls a 'terrible idea'.

Allison Williams offered valuable advice for parents navigating the annual Halloween costume shopping ritual. She suggests a strategic approach, advising early consideration of options but delaying purchases until closer to the holiday to prevent children from outgrowing their initial choices or facing sold-out items.
For Halloween 2026, Williams's son, Arlo, has already decided on his costume: an astronaut, reflecting his space exploration aspirations. Arlo has also taken on the role of costume designer for his parents, a development Williams humorously described as potentially a 'terrible idea,' anticipating imaginative and perhaps contrasting outfits for herself and her husband, Alexander Dreymon.