The 100 Cast Then and Now: Season 1 to Season 7

It feels like just yesterday we were watching the pilot episode of The CW's sci-fi series The 100, as a group of seriously underprepared juvenile delinquents were sent from space down to a radioactive Earth. Now, here we are seven seasons later watching fully-grown adults face bigger and badder obstacles all across the galaxy! 

We can't help but get emotional when reminiscing about all the ways Clarke (Eliza Taylor), Bellamy (Bob Morley), Octavia (Marie Avgeropoulos), and the rest of the gang have grown and changed over the years, which is probably why we made this "Then and Now" gallery. And yes, we've thrown in the rest of the cast's first appearances -- from Lindsey Morgan's early in Season 1 all the way to newbies like Lola Flanery who have only joined recently.

From their first appearances on the show to their Season 7 debuts, take a trip down memory lane and scroll through these photos of The 100 cast then and now!

Bob Morley, The 100

Bob Morley, The 100

Marie Avgeropoulos, The 100

Marie Avgeropoulos, The 100

Lindsey Morgan,The 100

Lindsey Morgan, The 100

Richard Harmon, The 100

Richard Harmon, The 100

Jarod Joseph, The 100

Jarod Joseph, The 100

Sachin Sahel, The 100

Sachin Sahel, The 100

Adina Porter, The 100

Adina Porter, The 100

Luisa D'Oliveira, The 100

Luisa D'Oliveira, The 100

Tasya Teles, The 100

Tasya Teles, The 100

Lola Flanery, The 100

Lola Flanery, The 100

Eliza Taylor, The 100

Eliza Taylor, The 100