4, 3, 2, 1 or 4321 may refer to:
Film 4.3.2.1., 2010 film by Noel Clarke ...4 ..3 ..2 ..1 ...Morte, a 1967 Italian science fiction film
Music "4, 3, 2, 1" (k-os song), song by k-os "4, 3, 2, 1" (LL Cool J song), song by LL Cool J "4-3-2-1", song by Raffi Boghosyan
Other uses 4 3 2 1 (novel), 2017 novel by Paul Auster 4–3–2–1, a common formation in association football
See also 1234 (disambiguation) "5-4-3-2-1", a 1963 single by Manfred Mann 54321 (film), a 2016 Tamil thriller film Countdown, a sequence of backward counting to indicate the time remaining before an event is scheduled to occur