Paris Hilton couldn't be happier that pal Nicole Richie is pregnant again.
"I think it's so exciting," Hilton told Usmagazine.com at her weekend-long "birthday" celebration at the Hard Rock Hotel. (The heiress turned 28 on Feb. 17.)
Continued Hilton: "She wants a big family. She's doing it fast.
"I hope it's a boy," she added, "I would love for Harlow to have a little brother to look after her."
In an interview to promote her jewelry line, House of Harlow 1960, in this month's Japanese ViVi magazine, Richie says she's not sure when -- and if -- she'll wed Joel Madden, the father of her child.
"I don't know about the future," she said. "I make it a custom not to plan the future. I may plan to and I may not."
When asked to name three good qualities about Madden, she says: "Good father! Talented musician! Good personality!"
Richie -- who wakes up at 6:45 a.m. every day to prepare herself before Harlow gets up at 7 a.m. -- says her daughter "[means] everything" to her.
Harlow's looks have changed since she was born last January.
"She had a close resemblance to Joel at the time of birth," Richie said. "But, she [now] looks like me because of her green eyes and blonde hair, but she also resembles Joel."
Richie says she switches up her style depending on if she's with Harlow or out with friends.
"I wear jeans and a T-shirt and no makeup when I am with my daughter," Richie explains. "But I take care of my 'adult time' too. I like to go to restaurants and bars in high-heeled shoes and dresses when I have free time. Because I am still 27 years old, you know?"
But she says she's not the clotheshorse people make her out to be, and she doesn't have a big closet.
"People think that I have a lot of clothes, but I actually wear...the same denim or leggings, but change things up to coordinate with different tops or accessories," she says. "If you look at a lot of recent paparazzi photos of me, the skinny jeans are always the same ones from JET."