Nicole Richie 'almost four months' pregnant

After months of rumours, US TV star Nicole Richie has confirmed that she is pregnant.

“Yes I am. We are,” Richie told ABC News’ Diane Sawyer in an interview to be aired this week. “I’m almost four months.” Richie’s boyfriend, Good Charlotte frontman Joel Madden, is the father.

The 25-year-old star of The Simple Life and Paris Hilton pal also talked to Sawyer about her guilty plea last week for driving under the influence and resulting four-day jail sentence.

“I have a responsibility and it’s something that I did wrong, and if I could personally apologise to every single person that has lost a loved one from drunk driving, I would,” Richie said. “And unfortunately I can’t, but this is my way of paying my dues and taking responsibility and being an adult.”

Richie also shared her thoughts on her hard-partying contemporaries and what effect their bad behaviour has on young fans.