Alex Hassilev was an American folk musician who was one of the founding members of the group The Limeliters. Educated at Harvard and the University of Chicago, he was also an actor with a number of film and television appearances to his credit. As a musician he played the guitar and the banjo and was fluent in several languages. After retiring from the Limeliters, Hassilev remained active in the field of record production.

The Limeliters are an American folk music group, formed in July 1959 by Lou Gottlieb, Alex Hassilev (banjo/baritone), and Glenn Yarbrough (guitar/tenor). The group was active from 1959 until 1965, and then after a hiatus of sixteen years, Yarbrough, Hassilev, and Gottlieb reunited and began performing again as The Limeliters in reunion tours. On a regular basis a continuation of The Limeliters group is still active and performing. Gottlieb died in 1996, Yarbrough died in 2016, and Hassilev died in 2024, the last founding member, who had remained active in the group, retired in 2006, leaving the group to carry on without any of the original members.