Nikki Danielle Moore is an American actress best known as the character Jenna Sharpe on the sitcom 8 Simple Rules from 2003 to 2005.

She has been credited as Nikki Hayden, Nikki D. Hayden but is now known as Nicole Hayden. One reason she has changed her screen name various times is because the Screen Actors Guild only allows one individual to perform under one name, and there were conflicts with her previous screen names. She has become somewhat of an Internet sensation after appearing as "Denise" in recent Taco Bell commercials.