Michael "Mikey" Nicholls (born 20 August 1985) is an Australian professional wrestler, currently signed to WWE where he competes in their developmental territory NXT under the ring name Nick Miller. He has wrestled internationally in Australia, the United States, and also Japan. He is best known for his work in the Pro Wrestling Noah promotion, where, as part of The Mighty Don't Kneel, he is a former two-time GHC Tag Team Champion. Other promotions he has wrestled for include New Japan Pro Wrestling in Japan and Ohio Valley Wrestling, Pro Wrestling Guerrilla and Ring of Honor in the United States.
- Finishing moves
- Blue Vengeance (Moonsault) – 2014
- Mikey Bomb (Spin-out powerbomb)
- Shooting star press
- Signature moves
- Southern Cross Stretch (Modified figure-four leglock)
- Diving crossbody
- Corner clothesline
- Lifting spinebuster
- "Mean Machine"
- Entrance themes
- "Joker & the Thief" by Wolfmother