Keeping up with sisters Kim and Khloe Kardashian

By ALICIA RANCILIO

NEW YORK — When “Keeping Up With the Kardashians” first debuted in 2007, Kim Kardashian was the star, whose claim to fame was doing a sex tape with a rhythm-and-blues singer named Ray J.

Now, the sex tape is old news, and Kardashian is famous for her fashion and beauty.

But other Kardashians have plunged into the star light: Sister Khloe Kardashian’s recent wedding special grabbed 3.2 million viewers; and tabloids and blogs followed every step of sister Kourtney Kardashian’s pregnancy. (She and boyfriend Scott Disick are parents of a boy, born Monday.)

Now, the whole Kardashian clan has returned to E! with a fourth season of their reality show. Kourtney and Kim recently talked about family, fame and sports in an interview.

Q. How have your lives changed since the first season?

Kim: I think even from season three to season four we’ve all changed. We’ve all grown so much closer together, so this season I think you’ll definitely see that, and we’ve added so many new family members to the mix now. (Kourtney Kardashian’s son, Mason Dash Disick; Khloe Kardashian’s husband, Los Angeles Laker Lamar Odom.)

Khloe: Our dynamic with each other has changed. I think that’s on rotation every month. We’re friends because we’re sisters, but I think we rotate on which one’s our best friend.

Kim (to Khloe): Who’s your best friend this week?

Khloe: You, because I’m with you more this week.

Kim: I’ve always wanted to hear that!

Q. Did you aspire to be in show business?

Kim: I don’t think we ever thought of being in the entertainment business. We started having our clothing stores six years ago before the show, and we’ve always been really fashion-oriented. ... The show opportunity just happened, and we’re just having so much fun.

Khloe: Also, as kids, all of our friends where either, like, Lionel Richie’s daughter or Rod Stewart’s kids, so we all grew up with a pretty cool clan of kids and parents. So ... I feel like we’ve always been, like, ... in the entertainment industry — just not well-known.

Q. Khloe, you’re married to a pro basketball player. Kim, you’re dating a pro football player. Are you sports fans?

Khloe: I am so into basketball. I won’t watch a regular game. But when I see Lamar play, I’m so into it. I cheer and I get mad, and if he gets fouled or they call a technical, it’s so crazy — like even that I know these words. It’s bizarre. And I love to watch football.

Q. Are the guys in your family really excited you have the sports connections?

Khloe: When I met Lamar the first night, I was with our brother Rob. Some guy was staring at me, and I kept saying, “You’re so rude. You’re staring at me” so he could hear me. Rob was like, “Please be nice. That’s Lamar Odom!” He’s like the best basketball player.” I was like, “I don’t care; he’s so rude!” (laughter)

Q. And fast-forward to now, and you’re married to that guy!

Khloe: And now I’m the one who is obsessed with him!” (laughter)

Q. You have three clothing stores. You’re known for your fashion. Have you always been stylish?

Kim: I think if we look back at the things we wore we were like, “I can’t believe I wore that.” But at the time, it was stylish. I think we’ve always been stylish.