He has been a cast member of the NBC sketch comedy series Saturday Night Live since the show's 48th season in 2022.

[3] Hernández grew up in Miami, Florida, where he attended Belen Jesuit Preparatory School.

He graduated from John Carroll University in 2019 with a degree in Entrepreneurship and Communication.

In 2021, Marcello became the assistant soccer coach of Belen Jesuit Preparatory.

[5] Hernández did comedy and performed short-form pieces on social media channels, such as the weekly review show Only in Dade about his home of Miami, on TikTok.