List of Famous people who are 21

Nathan Paul McGuinness is a creative director and visual effects supervisor. He was nominated for an Oscar for his work on the film Master and Commander: The Far Side of the World (2003) and won a BAFTA Award for his work on the film The Curious Case of Benjamin Button (2008).

Joseph W. “Joe” Pfeifer is a retired Assistant Chief of the New York City Fire Department (FDNY) and the founder of the department's Center for Terrorism and Disaster Preparedness (CTDP). He was also a first responder and survivor of the September 11 attacks, and the first senior fire chief on site and responded to the World Trade Center on that day.

Gala Montes is a Mexican television actress best known for her works in telenovelas. She became known on television for her character as Luz Marina in the seasons three and four of the drug trafficking television series El Señor de los Cielos (2015–2016). In 2018, she landed her first lead role in a telenovela on Mi familia perfecta (2018). In 2020 she joined Televisa to be part of the main cast La mexicana y el güero, and subsequently she got her second lead role in the telenovela Diseñando tu amor (2021).

Greg Edmonson is a music composer for television and movies. He is primarily known for composing the soundtrack to the cult TV series Firefly. He is also the composer for the first three games in the Uncharted video game series, and for a number of episodes of the American animated sitcom King of the Hill.