Caitlyn Jenner Has Another Grandbaby on the Way!

by Raphael Chestang 1:35 PM PDT, April 04, 2016
Photo: Getty Images

The Jenner family just keeps growing!

Only three months after Caitlyn Jenner's son, Burt Jenner announced that he and his wife were expecting, Caitlyn's daughter, Cassandra Marino, shared that she also has a baby on the way.

WATCH: Caitlyn Jenner Is Getting Another Grandchild

"IT'S A BOY!!!" she shared on Sunday. "Coming October 19th!!"

Photo: Facebook

The new addition will be the third child for Cassandra and husband Mark Marino. Their son will join big sisters Isabella and Francesca, who are shown in her Instagram post holding up a sonogram.

Burt, 37, and Cassandra, 35, are Caitlyn's children with her first wife, Chrystie Jenner, whom she was married to from 1972 to 1981.

Last year, Cassandra opened up to People about how her relationship with her Olympic gold medalist parent became richer after Caitlyn's transition.

WATCH: Burt Jenner Opens Up About Caitlyn's Transition

"My relationship with Caitlyn is much better than with Bruce, but we still have a lot of work to do," she said. "We didn't talk for years, and now we see each other every couple of weeks and talk on the phone, which I am grateful for."

Photo: Facebook

"She's happier and more appreciative of her family," Cassandra added. "She is trying harder, and there is a softness to Caitlyn that is new to me. I think part of that is that when someone is happier, they are just nicer."

In 2015, Caitlyn gained two grandchildren with the births of Kim Kardashian and Kanye West's son, Saint West, a Brandon Jenner and wife Leaf's daughter, Eva James.