"We're not at home anymore," Corden quickly responded. "I'm the king in this studio."
In one of Corden's most entertaining rap battles to date, Mirren fired off no shortage of jaw-dropping disses: "Sorry James I'm not single, but you know I taught your little mister to tingle."
One of Corden's best verses came toward the end when he took a shot at her "royalty" status and her recent role in the "Fast and Furious" franchise.
"You're called British royalty, but clearly you're not. Even in Hollywood as a queen, Meghan Markle took your spot. You appeared in the last 'Fast and Furious' without warning, you turned the whole franchise into very slow and boring. It's a shame in 'Harry Potter' you never played a teacher and your role in 'James Bond,' wait, you weren't in that either. I'm sorry that I had to be the one to take you down, I just defeated a Queen, someone hand me my crown," Corden rapped.
But Mirren proved her competition prematurely declared victory when she fired back with this empowering message:
"You f-cked up, James. You desperate tater tot. A woman's worth isn't credits or who says she's hot," Mirren rapped. "Boys club, bullsh-t, I'm done with that crap, you're welcome for this headline: 'Helen Mirren Can Rap.' Compare me to Meryl, Judi, Maggie, but why? They're not my competition, they're my ride or die. See, women are a force to be reckoned with and I reckon I wrecked you, you've been to hell and back, b-tch."