Floyd Roger Myers Jr. — a former child actor best known for his role in the “Fresh Prince of Bel-Air” — has died … TMZ has learned.

His mom, Renee Trice tells TMZ … Myers passed away in the wee hours of Wednesday morning from a heart attack at his home in Maryland. She tells us he suffered 3 prior heart attacks over the course of the last three years. She says she just spoke to her son last night.

Floyd kicked off his career as a younger version of Will Smith in the hit sitcom “The Fresh Prince of Bel-Air” … before taking on the role as a young Marlon Jackson in the television miniseries “The Jacksons: An American Dream.”

Myers had bit part in one episode of the short-lived TV drama “Young Americans” in 2000.

Floyd was 42.