An epic Dubsmash war broke out over the weekend between the casts of "Agents of S.H.I.E.L.D." and "Agent Carter" at the San Diego Comic-Con and it appeared the "S.H.I.E.L.D." stars had delivered the final blow when Clark Gregg dressed as Hayley Atwell's character, Peggy Carter.

But Atwell refuses to go down without a fight and has recruited possibly the greatest fighter in America's history to help restore her show's dignity and that man is Captain America!

The Marvel TV actress posted a new Dubsmash video to her Instagram on Wednesday set to the song, "Another One Bites the Dust" by Queen. It starts with a printed out Captain America poster signed by "Steve Rogers" that says, "To Coulson - Lot of love - Steve," referring to Gregg's Marvel character, Phil Coulson.

The camera then zooms out to reveal Atwell and her "Agent Carter" co-star James D'Arcy as they tear the paper in half to reveal Captain American himself, Chris Evans.

That's right! The 2015 Dubsmash War has spilled into the Marvel Cinematic Universe as Evans came dressed as his "Avengers" character complete with his Vibranium shield.

A video posted by @realhayleyatwell on Jul 15, 2015 at 2:41pm PDT

Atwell tweeted out the video to Gregg and his "S.H.I.E.L.D." co-star Chloe Bennet with the message, "Mic dropped, @clarkgregg @Chloe Bennet4? Consider it picked up and thrown out of the f***ing window..."

(UPDATE) Chloe Bennet responded on Thursday with this threatening Twitter message.

Gregg responded with a Facebook message on Wednesday night that read "(Ugly Crying) Dubsmash War continues" and a screenshot of Atwell's video. In the Marvel films, Coulson is a big Captain America fan and could barely find the words to speak to him when they first officially met in "The Avengers."

"Agents of S.H.I.E.L.D." is under the gun and will need to do their own MCU recruiting if they want to even the score.

Atwell, D'Arcy and Evans then celebrated in another hilarious Dubsmash video recreating the final scene of "Dirty Dancing." As she and D'Arcy talked about their successful video, Evans grabbed Atwell and pulled her in for a sweeping kiss while D'Arcy stood by the wall with a message that read, "Nobody Puts Jarvis In The Corner."

Aww, poor Jarvis! But don't feel too bad. The man is married.

Check back for more updates with Headlines & Global News as the Marvel Dubsmash War 2015 continues!