Lily Allen has lost her unborn baby ... this according to a statement the singer released through her rep.
Allen's rep explains, "It is with great sadness that we have to confirm that Lily Allen and Sam Cooper have lost their baby."
The statement, first obtained by People.com, continues, "The couple ask that their privacy be respected and that they be left alone at this deeply distressing time. No further comment will be made."
The 25-year-old British singer was due to give birth to a boy in January.
It's the second time Allen has miscarried -- she suffered the tragedy back in 2008 during her relationship with musician Ed Simons.