Nairobi Aries Spears, known professionally as Aries Spears, carved out a distinctive niche in American comedy as a sharp-witted stand-up comedian and a remarkably versatile impressionist. His most prominent claim to fame remains his eight-season tenure as the second longest-serving cast member on Fox's iconic sketch comedy series MADtv, where his uncanny vocal mimicry and comedic timing left an indelible mark on the show's legacy. Born on April 3, 1975, in Chicago, Illinois, Spears was raised by his mother, Doris Spears, and his family later moved to New Jersey, which he considers his hometown.

Spears demonstrated a precocious talent for comedy and impressions from an extremely young age, beginning his stand-up career as a teenager. His early dedication led to appearances on Showtime at the Apollo and Def Comedy Jam, platforms that showcased his raw skill and helped him build a following. His big break arrived in 1997 when he joined the cast of MADtv during its third season. Over the next eight years, Spears became a fan favorite, delivering spot-on and hilarious impressions of a vast array of celebrities including Shaquille O'Neal, Mike Tyson, Bill Cosby, and Arnold Schwarzenegger, among many others. His original characters, like the boisterous "Homeless James Bond," further solidified his reputation as a versatile and essential player in the show's ensemble.

Following his departure from MADtv in 2005, Spears continued to build his career through stand-up tours, television appearances, and film roles. He performed on numerous comedy specials and shows such as Comedy Central Presents and released his own one-hour special in 2011 titled Aries Spears: Hollywood, Look I'm Smiling. His filmography includes roles in movies like The Pest, Jerry Maguire, and The Longest Yard. In a notable departure from his mainstream comedy work, Spears co-hosted the AVN Awards in both 2018 and 2020. He remains an active presence on the stand-up circuit, known for his observational humor, social commentary, and that signature impression catalog that first brought him into the national spotlight.