Younger sister Khloe Kardashian, a familiar face around Cedars-Sinai Medical Center lately, was actually the first to tweet from the hospital. As she has frequently visited the Beverly Hills facility to see her husband, Lamar Odom, her message was bittersweet.
"I know these hospital halls way too well," she wrote. "[Hopping] from one room to another."
Ryan Seacrest -- who is essentially an extended Kardashian family member at this point -- also took to Twitter to congratulate the second time parents, writing, "Blessings on blessings.. congrats on ur baby boy @KimKardashian @KanyeWest!"
As for mom Kris Jenner, she simply retweeted Kim's initial announcement that stated, "He's here!"
Kim and Kanye, 38, are already proud parents to 2-year-old daughter, North West. They announced the birth of their son on the 35-year-old reality star's app. "Kim Kardashian West and Kanye West announce the arrival of their son this morning," the statement read. "Mother and son are doing well."
Kim reportedly experinced intense contractions Friday night, but the birth -- which took place in a deluxe maternity suite that is now filled with gifts, flowers and blue balloons -- went smoothly, according to People. The magazine also reports that she had experienced "pretty intense anxiety the lsat couple of days and especially yesterday just before the baby came."
The baby boy's name has not been announced yet, but we have a few ideas on what Kimye could name baby No. 2: