Nicholas Theodore Nemeth is an American professional wrestler. He is signed to Total Nonstop Action Wrestling (TNA), where he performs under his real name and is a double champion: he is the current TNA World Champion in his second reign and is one-half of the TNA World Tag Team Champions with his brother Ryan Nemeth in their second reign. He is best known for his tenure in WWE from 2004 to 2023, where he performed under the ring names Nicky and most notably Dolph Ziggler.