Simone Arianne Biles Owens (born March 14, 1997) is an American artistic gymnast. With eight Olympic medals and 30 World Championship medals, she is the most decorated gymnast in history and is widely considered one of the greatest gymnasts of all time. With eight Olympic medals, she is the seventh-most decorated female Olympic gymnast, and has the most Olympic medals earned by a U.S. gymnast.

On January 18, 2018, Biles revealed on Twitter that former USA Gymnastics physician Larry Nassar had sexually assaulted her and that USA Gymnastics had helped allow the abuse to occur and to cover it up. She did not attend Nassar's sentencing hearings from January 16 to 24, 2018, saying that she "wasn't emotionally ready to face Larry Nassar again".

Biles and the other survivors were awarded the Arthur Ashe Courage Award in 2018. At the 2018 U.S. National Championships, Biles wore a teal leotard that she had designed to honor the survivors of Nassar's abuse, as a statement of unity.  On September 15, 2021, Biles testified to the Senate Judiciary Committee that she blamed "the entire system" for enabling and perpetuating Nassar's crimes, saying that USA Gymnastics and the United States Olympic and Paralympic Committee "failed to do their jobs".  Three of her national-team teammates, McKayla Maroney, Maggie Nichols, and Aly Raisman, testified with her.