I know, that one just slipped right under the radar. With her first pregnancy it was all, "quick, need to get a picture of the bump!" Not so much this time.

The Teenage Mutant Ninja Turtles actress (seriously) welcomed her second son with husband Brian Austin Green (forever off Beverly Hills 90201) yesterday, according to TooFab.com.

The new arrival is a brother to their two-year-old, Noah. Brian also has another son, Kassius, 11, with his ex-partner Vanessa Marcil.

Last year, Brian apparently said he was doing all he could to support his wife through her pregnancy: "She is doing great, she did great the first time around. But I wouldn't wish the experience on anybody, I couldn't do it! I couldn't make a baby. It is unbelievable. I do whatever she asks for and I say 'Yes' no matter it may be."

In November Megan said things had started off difficultly, telling ABC news: "I've had rough first trimesters. But once you get into the second, it's fine after that." Apart from not being able to turn over in bed, and generally feeling like your pelvis is going to give way.

Megan has also told how being a mother to Noah helped take her mind off the pregnancy, saying: "I don't have time to think about [what's different this time], I have a one-year-old running around. And then when you're working like 16 hours a day, there's no time for you at all."

This time around, Megan chose to keep the details of the labour to herself, unlike the first time..

>Megan Fox continues to say stuff best left unsaid: 'first contraction that I got was horrific!'