Lauren Conrad is having a boy! The fashion designer, who is expecting her first child with husband William Tell, announced the sex of her baby in a sweet Instagram post on Friday. "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," she captioned an illustration of a boy driving a car that reads, "It's a guy." Since announcing her pregnancy in January [1], Lauren has been perfectly documenting her growing bump [2] on social media. And she's also not the only former star of The Hills that's currently expecting [3]. Her ex-boyfriend, Jason Wahler, is also going to be a first-time parent [4], and former friend Heidi Montag is expecting her first child with husband Spencer Pratt.

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