Stanley Clements was born in Long Island, New York. Young Stan realized that he wanted a show-business career while he was in grammar school, and when he graduated from college he toured in vaudeville for two years. He then joined the touring company of the Major Bowes Amateur Hour. In 1941, he was signed to a contract by 20th Century Fox and appeared in several B films for the studio.
After a short stint with the East Side Kids, he set out on his own again, this time landing roles in more prestigious pictures (his breakthrough role was as a jockey in the Alan Ladd feature "Salty O'Rourke"). His career was interrupted by military service in World War II, and when he returned, he began appearing in lower-budgeted films. He starred in a series of action/detective pictures at Allied Artists for producer Ben Schwalb and director Edward Bernds.
Schwalb soon became staff producer for The Bowery Boys, and when he needed a replacement for Leo Gorcey in 1956, he asked Clements to step in. Clements comfortably settled into the role of Huntz Hall's sidekick, and co-starred in the final seven Bowery Boys comedies.
The series finally ended in 1958, and Clements went on to a steady career of supporting roles in film and TV until his death from emphysema in 1981. One of his last jobs was an appearance in a nationally advertised commercial for Pringle's potato chips.