You know the drill. The celebrities start by wearing slightly odd clothing. Then they furiously deny they are pregnant. Then they announce they are once the bump can't be hidden (and god forbid anyone thinks they're putting on weight).

A quick birth (in total silence if you're Katie Price), the announcement of the world's stupidest name, and then it's a race against time to get back into pre-pregnancy shape so you can put out an exercise video.

Mix with one or all of the baby being unwanted (Jude Law's latest bump is pictured) someone else's, the father running off, and a team of nannies, and you have the perfect recipe for a pregnant celebrity.