Actress KATE HUDSON struggled through severe bouts of morning sickness while pregnant with her second child.

The Almost Famous star, who welcomed son Ryder with ex-husband Chris Robinson in 2004, fell pregnant with fiance Matt Bellamy's baby in late 2010.

Hudson largely stayed out of the spotlight for the duration of her term, and the actress admits it was because she felt so nauseous while carrying little Bing, who was born last July (11).

She tells Harper's Bazaar magazine, "Bing was a more difficult pregnancy than Ryder. Ryder was easy; I didn't get sick or nauseous at all. With Bing I was really nauseous. He also moved around so much... He was just rockin' out."

Hudson also reveals the two boys have very different personalities: "Ryder and Bing are polar opposites. In order to get a smile out of Ryder, you had to work really hard when he was a baby... But Ryder is comfortable in his own skin...

"Bing is just smiling - he's happy, he's joyous."