In a retrospective look at the iconic television series “Seinfeld,” which first aired in 1989, fans are reminded of its legendary cast and their journeys over the past 35 years. As of 2025, the principal actors have aged significantly since their debut in the series, continuing to leave a mark on the entertainment industry.

Jerry Seinfeld, who portrayed the titular character, was 35 at the show’s inception and is now 70 years old. Julia Louis-Dreyfus, known for her role as Elaine Benes, was 29 at the time and is currently 64. Michael Richards, who played the eccentric Cosmo Kramer, was 40 in 1989 and has reached the age of 75. Jason Alexander, who depicted George Costanza, was 30 then and now celebrates his 65th birthday.

The series has also seen the loss of several beloved cast members. Ruth Cohen, who played the cashier, passed away on August 23, 2008, at the age of 78. Estelle Harris, known for her role as Estelle Costanza, died on April 2, 2022, at the age of 93. Jerry Stiller, who portrayed Frank Costanza, also left us on May 11, 2020, at 92 years old. Liz Sheridan, who played Helen Seinfeld, passed away on April 15, 2022, at the age of 93. Other notable cast members who have passed include Barney Martin, Richard Herd, and Peggy Lane, each contributing their unique talents to the series.

Wayne Knight, who portrayed Newman, remains active as he turns 69, while Heidi Swedberg, known for her role as Susan Ross, is now 59. John O’Hurley, who played Jay Peterman, is currently 71.

As the years progress, the impact of “Seinfeld” continues to resonate with audiences, both through its enduring humor and the memorable performances of its cast. The legacy of the show is a testament to its cultural significance, reminding fans of the joy and laughter it brought to millions around the world.