Nicole Richie has been hospitalized for pneumonia, MTV News has confirmed. The socialite is currently undergoing treatment for the illness at Cedars-Sinai Medical Center in L.A.

"Nicole has checked into Cedars-Sinai, where she is being treated for pneumonia," her rep said in a statement to Us Weekly. "She is doing well."

Us reported that the socialite had to skip the November 10 launch of her House of Harlow jewelry at Bebe in L.A., citing illness.

Richie, who has two kids with Good Charlotte frontman Joel Madden, was apparently ill in court Monday while testifying against two paparazzi who she said caused her to get into a car accident. She was granted restraining orders against the photographers.

Over the weekend, she tweeted that she wasn't feeling well. "OK, cold, it's been 6 days," she wrote. "Let's part ways graciously & keep it moving."

In September, Richie gave birth to her second child, son Sparrow James Midnight Madden. She and Madden already had a daughter, 2-year-old Harlow. "I couldn't be happier," Richie told People magazine about being a mom. "The only thing you want is for your kids to be healthy and happy, and they are. I'm right where I belong."

In the issue, Richie dished that her daughter is absolutely smitten with her younger brother. "I'm glad I had a girl before I had a boy," Richie said. "She just loves him so much." Madden added that their daughter isn't rough with her little brother. "She's very gentle with him," he said.