See How the 'Criminal Minds' Cast Has Changed Since Their First Seasons (PHOTOS)

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CM cast changed
CBS (3)
CM S1 Reid
CBS

Matthew Gray Gubler as Dr. Spencer Reid in Season 1

Night Lights
CBS

Matthew Gray Gubler as Dr. Spencer Reid in Season 14

CM S1 JJ
CBS

A.J. Cook as Jennifer “JJ” Jareau in Season 1

Hamelin
CBS

A.J. Cook as Jennifer “JJ” Jareau in Season 14

CM S1 Garcia
CBS

Kirsten Vangsness as Penelope Garcia in Season 1

Sick and Evil
CBS

Kirsten Vangsness as Penelope Garcia in Season 14

CM S2 Prentiss
CBS

Paget Brewster as Emily Prentiss in Season 2

Flesh and Blood
CBS

Paget Brewster as Emily Prentiss in Season 14

CRIMINAL MINDS
Cliff Lipson/CBS

Joe Mantegna as David Rossi in Season 3

Sick and Evil
CBS

Joe Mantegna as David Rossi in Season 14

Beyond Borders
Trae Patton/CBS

Daniel Henney as Matt Simmons in Season 10

Henney guest-starred in the backdoor pilot for the spinoff, Criminal Minds: Beyond Borders in Episode 19. He joined the cast as a series regular in Season 13.

Rule 34
Eddy Chen/CBS

Daniel Henney as Matt Simmons in Season 14

The Job
Cliff Lipson/CBS

Aisha Tyler as Dr. Tara Lewis in Season 11

Night Lights
CBS

Aisha Tyler as Dr. Tara Lewis in Season 14

The Crimson King
Eddy Chen/CBS

Adam Rodriguez as Luke Alvez in Season 12

Night Lights
CBS

Adam Rodriguez as Luke Alvez in Season 14

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The BAU looks quite different after 14 seasons of Criminal Minds — and not just because agents have come and gone over the years.

Only three of the team's members from Season 1 are still around: Matthew Gray Gubler's Dr. Spencer Reid, A.J. Cook's Jennifer "JJ" Jareau, and Kirsten Vangsness's Penelope Garcia. Paget Brewster joined as Emily Prentiss in the second season, and Joe Mantegna's David Rossi became part of the team a year later.

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The rest of the agents — Dr. Tara Reid (Aisha Tyler), Luke Alvez (Adam Rodriguez), and Matt Simmons (Daniel Henney) — joined in the past few years.

Ahead of the CBS drama's final season, we're taking a look at how the stars have changed from their first seasons to the most recent. Click through the gallery above to see who looks the most different.

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Criminal Minds, 15th and Final Season, Coming Soon, CBS