EXCLUSIVE: 'Laguna Beach' Alum Casey Reinhardt on Expecting Second Child, Having Two Kids Under 2

Copyright (c) 2016 CBS Studios Inc. All Rights Reserved.

Congrats to Casey Reinhardt!

The Laguna Beach star is expecting her second child with husband Sean Brown, and couldn't be more excited.

WATCH: Casey Reinhardt and Husband Sean Brown Welcome First Child

"I am due Jan. 29, 2018! I am 15 weeks along now," Reinhardt, who is already mom to daughter Kensington, exclusively tells ET. "Kensington will be turning one in a few weeks, so our babies will be 17 months apart. Two babies under two years old!"

"I am feeling amazing and haven't had a day of morning sickness during this pregnancy! I was sick everyday for the first 15 weeks with Kensington," she adds. "This has been such a great pregnancy and, most importantly, our baby is doing so well and is so healthy! I am craving everything spicy and salty!"

Reinhardt and Brown, who know the gender of their baby but are waiting to reveal it, are "very excited" about what they're having -- and say their daughter is too.

"Sean and I keep telling her she's going to be a big sister and she understands the excitement and happiness, but she's only 11 months old, so I don't think she quite understands that she is going to have a sibling soon," Reinhardt explains. "She loves other babies though, so we are all so thrilled for our little love to arrive."

WATCH: That's So 2004! What We Learned From The First Season of 'Laguna Beach' 10 Years Ago

Reinhardt and Brown tied the knot in a lavish Orange County ceremony in February 2016. See more in the video below.

Reporting by Deidre Behar.

Copyright (c) 2016 CBS Studios Inc. All Rights Reserved.