Hilary Duff and her husband Matthew Koma playfully pranked friends Nicole Richie and Joel Madden by dressing as the Madden brothers, Benji and Joel, for a pre-Halloween dinner. The couples share a close friendship, despite Hilary having dated Joel two decades ago. Koma shared their costume on Instagram, which delighted Nicole and Joel, who also posted about it. Hilary and Matthew have been married since 2019 and have three children together, while Joel and Nicole, married since 2010, have two teenagers. The couples are neighbors and frequently socialize, as Hilary noted on a recent episode of Watch What Happens Live. Their lighthearted interaction showcases a strong bond, blending friendship and family ties.