Highlights included a western-style cake decorated with photos of Seymour and former castmates and topped with a horse. Seymour delivered remarks, and Joe Lando danced with her granddaughters, Willa and Luna, during the festivities.
Seymour called the reunion "incredibly moving," saying the Jubilee felt like more than a party and expressing gratitude for friends, fans and support for Open Hearts Foundation. She also told PEOPLE she plans to celebrate her 75th throughout the year, with a family gathering hoped for in early August.