Keeping Up with the Kardashians' seventh season will premiere Sunday, May 20 at 9PM ET/PT on E!, the network has announced.

The seventh-season premiere will feature Kris Jenner upset about recent media reports that Khloe Kardashian is not the biological daughter of the late Robert Kardashian and actively attempt to prove to the world Khloe is a true Kardashian, creating family tension in the process.

Keeping Up with the Kardashians' expanded seventh season will consist of 18 one-hour episodes and feature a pregnant Kourtney Kardashian and boyfriend Scott Disick preparing their son Mason for their new baby girl's arrival, Kylie Jenner and Kendall Jenner finding ways to stand apart from their older sisters as they get jobs at a major magazine, and former Dancing with the Stars participant Rob Kardashian becoming a businessman.

Bruce Jenner and Kris will also "go through a rough patch after Bruce reveals that he feels taken for granted," according to the network. 

In addition, the upcoming season will follow Kourtney, Kim Kardashian and Khloe Kardashian as they move their DASH clothing boutique from Calabasas to Hollywood and try to agree on how to run it. Kourtney will also consider different childbirth options, while Khloe will continue to support husband Lamar Odom as he plays basketball in Dallas, TX but also take time to surprise the whole family and join them on vacation in the Dominican Republic.

Keeping Up with the Kardashians is produced by Ryan Seacrest Productions and Bunim/Murray Productions with Jonathan Murray, Gil Goldschein, Jeff Jenkins, Farnaz Farjam, and Kris Jenner serving as executive producers.