Can you believe it's been nearly 20 years since The West Wing first hit the small screen? We can't!
Click through the gallery below to see the cast — including Rob Lowe, Martin Sheen, Allison Janney and more! — then and now.
It's no secret Rob became one of the most popular TV and movie stars of his generation after appearing in 1980s hits including St. Elmo's Fire and The Outsiders! In addition to The West Wing, the 52-year-old has found TV success with leading roles on Brothers & Sisters, Parks and Recreation and The Grinder.