The 100's Clarke Griffin will not be a happy camper when Lexa drops back into the picture.

'The 100' Season 3 Spoilers: Jason Rothenberg Teases 'Crazy' Collision Of Storylines; How Will AI, Grounders & Arkers Collide?

The fierce Grounder and the young Arker leader saw their romance crumble after just one kiss, and actress Eliza Taylor is quite certain that Clarke will not feel like jump starting the Clexa 'ship the second Lexa (Alycia Debnam-Carey) rides back into her life. Betrayals a tough hurdle to get over.

"I think there's defiantly resentment," Taylor told Flicks and the City at San Diego Comic-Con, shortly before showrunner Jason Rothenberg's announcement that Debnam-Carey will return in season 3. "I think that if Lexa comes back, it's not going to be nice. She broke her heart."

'The 100' Season 3 Spoilers: Meet Titus & Pike, A New Grounder & Arker Cast

It is unknown when, or for how long, the Grounder will come back into the storyline, but viewers can bank on it being particularly climactic. According to Rothenberg, the 13-episode season will certainly keep viewers on their toes.

"I can't wait for you all to see #The100 Season 3! It's insane so far! INSANE! @The100writers are crushing it! #YouAintReady #TheWaitSucks," Rothenberg teased on Tuesday.

Find out more when The 100 returns to The CW this spring. Catch up on the season 2 finale below.