But it was Stiller’s cantankerous and ever-shouting Frank Costanza on “Seinfeld” that ... he would say it while screaming: “Serenity now!” The social-media outpouring of love for Stiller ...

Estelle Harris, best known for playing Estelle Costanza on Seinfeld ... episodes and became beloved for her character’s constant screaming at her family and hilariously overbearing nature.

Favreau played Eric the Clown on the season five episode, “The Fire,” which aired in May 1994. Basically, Eric is appearing at a kid’s birthday party that George Costanza is attending.