Kiernan Shipka
Credit: Instagram/kiernanshipka

Mad Men’s final season returns April 5, and Kiernan Shipka is already commemorating the last seven episodes by taking a nostalgic look back. This weekend, the actress, who plays Sally Draper on the hit AMC show, took to Instagram to share some behind-the-scenes photos of the cast from the show's first season, and you won't believe how much they've all changed.

"The Beginning of an Era," Shipka captured the first of three photos (above), a nod to the title of the second half of Season 7's episodes, "The End of an Era." The photo shows a young Kiernan (she was only six when she began working on the show), smiling next to Jon Hamm, aka Don Draper.

The actress also shared a photo of herself with January Jones and another photo with Hamm. It's safe to say that Shipka will miss playing Jones and Hamm's on-screen daughter come May 17, when the series finale airs. Until then, view the rest of the photos below and don't forget to tune in to AMC when Mad Men returns Sunday, April 5.