Getty The 2026 Met Gala happened this week and the event's age rule was broken for the first time since it was implemented back in 2018. The rule went into effect in 2018 and was made public by Dance Moms star Maddie Ziegler, who revealed that she wasn't allowed to attend that year as she was too young. She was only 15 at the time. THR did some digging at the time and learned that new guidelines had been imposed.