She wrote on her twitter page: "I feel like a penguin, not the chocolate covered biscuity kind, but an actual penguin that waddles … now can't stop thinking about chocolatey penguins doh! (sic)."
Lily – who got married to Sam Cooper earlier this summer – is starting to feel the effects of pregnancy as she enters her third trimester.
In a twitter post last Sunday, she wrote: "I can't see my toes and I'm not bendy anymore."
Since tying the knot in June, Lily and Sam have been living in domestic bliss at their country home in Cranham, Gloucestershire, South West England.
The 26-year-old singer has even been learning how to knit and sew, previously saying: "I'm being taught how to knit. I'm so not rock 'n' roll anymore. I'm embroidering too. I'm actually in the process of making cushions."
Lily Allen feels "protected" by her local church
Lily Allen is married and pregnant!
Lily Allen has hired a 12-year-old DJ for her wedding