Hallmark Father's Day cards fade; a tweet announcing the sex of your second baby is forever.

Yesterday (June 21), while kids treated their dads to games of catch in the front yard or tours of local craft breweries, Kim Kardashian announced the sex of her baby to her beloved husband, Kanye West (plus, you know, the better part of the world), and confirmed that the Hollywood Royal family will soon include a little prince. Hope the crown's fitted and ready to go!

"You're such a good daddy to North & you will be the best daddy to our new son too!" Kim K. tweeted to cries of "I KNEW IT, YASSS" and "SOUTH WEST PLEASE" from eager followers.

Kim first announced she was pregnant to her sister Khloe during the mid-season finale of Keeping Up With The Kardashians.

Kimye, who have been married for a little more than a year, welcomed their first baby, a daughter named North, in June 2013. North was delivered five weeks early, but has since grown into a stylish little toddler.

Kim told Australian radio show 92.9 last November that she'd support North in any endeavor—even if her daughter chose to pose nude. That considered, we can definitely see Nori and her brother following in their dad's footsteps and being a pair of artist types!

Think Kim and Kanye are ready for a little boy? Be sure to send the couple your congratulations.

See a handful of celebs sans makeup: