Lauren Conrad has announced whether she's pregnant with a baby boy or girl.

The former The Hills star revealed the sex of her baby on the way with husband William Tell.

"I found this adorable birth announcement while helping my Grandma move and I thought it was the perfect way to share that William and I are expecting a baby boy," Conrad, 31, captioned an illustration of a boy driving a race car on Instagram.

Conrad shared the image on Friday, June 2, and the card reads, "It's a guy."

Conrad just celebrated her baby shower last month with her loved ones.

"So lucky to have these wonderful ladies in my life!" the fashion designer and author captioned a Snapchat of her girlfriends posing poolside, according to Us Weekly. "They spoiled me with a beautiful shower today."

Conrad and Tell, a 37-year-old singer and songwriter with a law degree, revealed in January that they're expecting their first child together.

The couple began dating on Valentine's Day 2012, got engaged in October 2013, and then tied the knot in September 2014.

Although Conrad and Tell sparked up a romance about two years before getting married, The Hills alum previously admitted she had laid eyes on him long before their first date.

"I met my husband when I was 16 and sitting on stage at one of his concerts," Conrad wrote of Tell, who was in the band Something Corporate from 2001 to 2004, on her blog. "Ten years later, we were set up on a blind date."

Conrad left The Hills -- which MTV ended after six seasons in 2010 -- during its fifth season in 2009, ending a five-year period in which she starred on both The Hills and its Laguna Beach predecessor, which followed her as a 17-year-old high school senior in Laguna Beach, CA.

Ironically, both Heidi Montag and Whitney Port from The Hills are both pregnant right now. Montag is also expecting a son with her husband Spencer Pratt.