The monikers are many: (1) "Generation Y"; (2) "Echo Boomers"; (3) "GenMe"; (4) the "Net Generation"; (5) "RenGen"; and (6) "Generation Next". One name that appears to be gaining currency is "Millennials," perhaps as a way to better differentiate the current generation from its predecessor, Generation X. Millennials are those individuals born between 1982 and 2002, give or take a couple of years. They represent a generation that began to spill onto college and university campuses at the turn of the millennium and have already had a subtle--and sometimes not so subtle--impact on campus space. Millennials now influence space planning, design, and construction and will continue to transform higher education as they return to campus as faculty and staff. The Baby Boomers have garnered much of the press in recent years given their sheer numbers, although people were clearly reminded by Tom Brokaw of the incalculable contributions of the G.I. or "Greatest" Generation. How do the Millennials fit into the historical constellation of generations? Although an entire generation cannot be uniformly categorized, it is clear that generational cohorts have some values and traits in common given their shared social and historical experiences. The dividing dates between cohorts are not rigid--and, indeed, individuals on the generational "cusps" share traits from neighboring generations--but there is rough agreement regarding how these cohorts are distributed over time. In this article, the author provides brief descriptions of the four generations immediately preceding the Millennial Generation: (1) "The G.I. Generation" (born 1901 to 1924); (2) "The Silent Generation" (born 1925 to 1942); (3) "The Boomer Generation" (born 1943 to 1960); and (4) "Generation X" (born 1961 to 1981). The author also discusses the characteristics of the millennial generation.