In a recent conversation with PEOPLE, actress Allison Williams discussed the nuances of purchasing Halloween costumes for children. The 38-year-old, who is a mother to a four-year-old son named Arlo with her husband, Alexander Dreymon, highlighted the importance of timing in navigating the world of festive costumes.
:max_bytes(150000):strip_icc():format(jpeg)/Allison-Williams-Dupixent-101526-02-293a6659dd054231b5c23f71804919b9.jpg)
Williams elaborated on her methodology, stating, “It’s kind of a science, honestly.” She explained that parents must balance the delicate act of planning ahead without buying too early or too late. “If you go too early, they’ve moved on to another idea, and if you go too late, they’re sold out,” she remarked, indicating that finding the perfect moment is key to a successful Halloween preparation.
The actress, known for her role in the hit series *Girls*, shared her own experiences with the Halloween costume planning process. According to her, it becomes easier when children have a set idea of what they want to be. In Arlo’s case, he appears to have a clear aspiration to become an astronaut. “He has plans for things that he’d like to make to launch into space, so he decided a long time ago that [he will be] an astronaut,” she said with enthusiasm.
Williams and Dreymon, who is 43, first crossed paths while filming *Horizon Line*, where the chemistry they displayed on-screen soon blossomed into a romantic relationship off-camera. Their relationship took a private turn when they welcomed Arlo in November 2021. The couple opted for an emergency C-section, keeping this significant moment a secret until they revealed their son’s birth in April 2022.
Their bond has since strengthened, and in June 2025, PEOPLE confirmed that the couple had wed in secret, a development hinted at when Williams referred to Dreymon as her “husband” during an interview with *The Guardian*.
Reflecting on their plans for Halloween 2026, Williams claimed that Arlo’s predictability has made the task of costume planning less complex. However, she has decided to extend the creative process to Arlo by allowing him to design their costumes. “We’ve also given him the power of designing our costumes, which is probably a terrible idea,” she added jokingly.
As for the kind of costumes they might end up donning at Arlo’s suggestion, Williams teased, “He’ll tell my husband to be something hot like Han Solo, and I’ll be, like, Darth Vader.” This playful banter showcases the light-hearted atmosphere that surrounds their family traditions.
Alongside her family commitments, Williams is also active professionally. She has recently partnered with Sanofi and Regeneron for a campaign promoting Dupixent, an eczema treatment. Balancing motherhood, her marriage, and her career, Williams continues to share the ups and downs of parenting, as well as her thoughts on parenting trends like Halloween costume planning.
Williams’s insights reflect the reality many parents face today, showing that even the joy of choosing a costume is intertwined with logistical considerations. As the spooky season approaches, her unique perspective offers a glimpse into the careful planning that parents often undertake to ensure their children can enjoy the festivities without any hitches. Her practical advice, coupled with her engaging humour, captures the heart of parenting during one of the year’s most exciting celebrations.