"The 100" Season 5 is adding a new face in an existing role.

"Shadowhunters" star Lola Flanery is joining The CW series as the new Madi, aka Clarke's (Eliza Taylor) "daughter," who debuted in the Season 4 finale, as played by Imogen Tear. The role will be a big deal in Season 5, with Madi and Clarke's story getting big play.

Here's what executive producer Jason Rothenberg told TVLine:

"This relationship is hugely important for Clarke. She's been with her for five years. They are, for all intents and purposes, bonded the way a mother and daughter would be. So Clarke loves her, and her decision-making process has changed, just as it does for anyone who has a child. ... We'll tell the story of how they came together in Season 5, and how they've been surviving as the only two people on the planet."

"The 100 Writers Room" tweeted out the casting news, which was first shared in an interview Flanery had with TV Series Hub:

Here's the "100" part of her Q&A:

The 100, have you watched it all? What role will you play and what should we expect from your character?
I have watched The 100, all of it in fact. After I found out I got the part I had a full binge session. I'll be playing Madi , she and Clarke seem to be the last people on earth after Priamfaya. Clarke has become somewhat of a mother figure for Madi , so I think that means Madi will also be a badass ????

Can you tease some spoilers for the fans for next season?
No !!

We'll meet this new young Nightblood in "The 100" Season 5 premiere, which will air in 2018 on The CW.

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