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Ryan Seacrest is gearing up for Rob Kardashian and Blac Chyna's upcoming E! docu-series, Rob & Chyna.

E! News caught up with the former American Idol host at the Macy's launch of his clothing line Ryan Seacrest Distinction Rio where he opened up to us about the forthcoming reality show and what fans can look forward to when it premieres. "You can never guess what to expect with that family," he told us, "but I think it's exciting for them—this time for them. I think because they're expecting."

As for the couple, Rob and Blac are both looking forward to letting their fans inside their worlds. The Lashed salon owner keeps her followers in the loop via Snapchat, Twitter and Instagram, but the more personal details will be revealed during the 6-episode series.

Blac Chyna, Rob Kardashian, Ryan Seacrest

Xavier Collin/Image Press/Splash; D Dipasupil/FilmMagic

"I think they're excited to have this opportunity to show the world what's going on with them," Seacrest added. "There's so much paparazzi coverage. There's so much talk about them that I think they're excited to show the world what's happening with them."

Rob has been on a mission to lose weight, and the Keeping Up With the Kardashians star has kept his promise. The 29-year-old reality star recently celebrated his progress with a before-and-after photo, but said he still has more to lose. "LOL‼ still got a lot of work to do and weight to lose but glad I'm getting better :):):)," he captioned the pictures on Instaram.

Seacrest addressed Rob's weight loss and recalled when he and the Arthur George designer used to work out together. "I used to run with him on the treadmill," Seacrest shared.

"He stopped for a little bit, but he's looking so much better."

Make sure to tune-in to Rob & Chyna when it premieres later this year only on E!.