A photo posted by Leah Jenner (@leah_jenner) on Mar 15, 2015 at 2:28pm PDT

One thing's for sure, this baby will have plenty of aunts and uncles! Brandon Jenner, the son of Bruce Jenner, and his wife Leah Jenner are expecting their first child together, the couple announced on Instagram on Sunday, March 15. 

"Well, it's time we share the good news," Leah, 32, captioned a shot holding her tiny baby bump as Brandon, 33, hugged and kissed her. "We're having a baby." 

The couple, who performs in the indie pop group Brandon & Leah and has appeared numerous times on Keeping Up With the Kardashians, have seen plenty of pregnancies firsthand from their famous stepsisters (and stepsisters-in-law). 

Brandon is the son of Bruce's ex-wife Linda Thompson and the older brother of Hills alum Brody Jenner. Brandon and Brody starred together on The Princes of Malibu prior to Brody's time on The Hills

Brandon and Leah married in May 2012 in Hawaii.