Susan Luckey Dead -- 'Music Man' Actress Dies at 74

Susan Luckey – who famously played the role of Mayor Shinn's daughter Zaneeta in the 1962 classic “The Music Man” – passed away at her L.A. home early Thursday morning at the age of 74 … this according to her daughter Shayna Reynolds.

Reynolds tells TMZ that her mother – real name Suzanne Douglas -- hadn't been suffering from any long-term illness ... explaining that her death was "just old age."

We're told Susan didn’t want a traditional funeral -- instead, her body was cremated and the remains placed in a "decorative box" where other family members have been laid to rest.

Besides her role in "The Music Man," Luckey starred alongside Shirley Jones in the 1956 film “Carousel” … and was one of the Native Americans in the original Broadway production of “Peter Pan.”

R.I.P.