There are enough people in the Kardashian-Jenner family now they could start their own football team and have players to spare.

In this sneak peek at season 18, which premieres Thursday, Mar. 26 at 8 p.m., the long-standing tension between sisters Kourtney Kardashian and Kim Kardashian appears to get the best of them.

Learn their birth order and other facts about each one of the Kardashian-Jenners, like their birthday and if they have any children, ahead.

Kourtney Kardashian

Birth order: First. Kourtney is the oldest of the Kardashian-Jenner children.

Birthday: April 18, 1979

Parents: Kris Jenner and Robert Kardashian

Current age: 39

Marital status: Unmarried. There are rumors the oldest Kardashian is dating Travis Barker. He’s made an appearance on Keeping Up with the Kardashians and has reportedly been seen sneaking out Kourtney’s house late at night.

Children: Kourtney has three children with her ex Scott Disick; Mason Disick (9), Penelope Disick (6), Reign Disick (4).

Kim Kardashian

Birth order: Second

Birthday: Oct. 21, 1980

Parents: Kris Kardashian and Robert Kardashian

Current age: 38

Marital status: Married to rapper Kanye West who is 41 years old.

Children: She and West have three kids together; North (5), Saint (3), and Chicago (1). The couple confirmed in January 2019 that they’re expecting a baby boy via surrogate.

Khloe Kardashian

Birth order: Third

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Birthday: June 27, 1984

Parents: Kris Kardashian and Robert Kardashian.

Current age: 34

Marital status: Unmarried.

Children: Yes. Khloe has one daughter, True Thompson. She welcomed True with her now ex-boyfriend, NBA player, Tristan Thompson, on April 12, 2018.

Thompson and Khloe broke up after cheating allegations surfaced about Thompson cheating on Khloe with Kylie Jenner’s best friend, Jordyn Woods, while she was at a party at Thompson’s house over Valentine’s Day weekend.

Cheating’s been an issue for the couple before but this time it was over for the couple. Recent drama aside, Khloe plans on inviting Thompson to True’s upcoming first birthday party.

Rob Kardashian

Birth order: Fourth

Birthday: March 17, 1987

Parents: Kris Kardashian and Robert Kardashian.

Current age: 31

Marital status: Unmarried.

Children: Yes. Rob Kardashian has one daughter, Dream Kardashian (2), he had with his ex, Blac Chyna. Rob and Blac Chyna have been battling over custody of their daughter for years.

Kendall Jenner

Birth order: Fifth

Birthday: Nov. 5, 1995

Parents: Kris and Caitlyn Jenner (formerly Bruce Jenner).

Current age: 24

Marital status: Unmarried. Kendall is dating Philadelphia 76ers player, Ben Simmons (22). Dating rumors began in May 2018. Kendall confirmed her relationship with Simmons when she appeared on an episode of The Ellen DeGeneres Show in February 2019.

Children: No.

Kylie Jenner

Birth order: Sixth. She is the youngest of the Kardashian-Jenner children.

Birthday: August 10, 1997

Parents: Kris and Caitlyn Jenner (formerly Bruce Jenner)

Current age: 21

Marital status: Unmarried. There was a rumor that boyfriend, Travis Scott, proposed to Kylie during the Super Bowl this year but Kendall put it to rest during an appearance on The Ellen DeGeneres Show. Her exact words were, “as far as I know” he didn’t propose.

Children: Yes. Kylie welcomed her daughter Stormi Webster with Scott on Feb. 1, 2018. They recently three Stormi an epic first birthday party more elaborate than most people’s weddings.