Speculation is growing that Jamie Lynn Spears is more than three month’s pregnant, as she has claimed in a U.S. magazine.

Jamie Lynn told OK! that she is expecting a baby with her live-in boyfriend of three years, Casey Aldridge – and is 12 weeks along.

However, there are signs that this estimation may be slightly out - two months out.

TMZ reports: "We hear Jamie is further along than the 12 weeks she says in the mag's article. Expect a spring baby.”

Back in July, the Nickelodeon star threatened legal action against the National Enquirer after the publication reported that Britney’s little sister was pregnant.

The Enquirer say they received the following letter:

“Ms. Spears is a devout Christian with a spotless reputation, who lives in accordance with the highest moral and ethical standards in accordance with her faith.

There is no “rumor” concerning Ms. Spears’ (non-existent) pregnancy, except perhaps for the baseless “rumor” just now being created by the National Enquirer.

Ms. Spears is not pregnant. It is pathetic for the National Enquirer to attempt to create a wholly baseless “rumor” that Ms. Spears is pregnant, so it can run a malicious story and false story which would be emotionally devastating to a morally upright 16 year old girl.”

Could the Enquirer have been on the money after all?