Kim Kardashian shared a first photo of son Saint West on her website and app Monday.

The 35-year-old "Keeping Up with the Kardashians" star delighted fans by posting a picture of the 2-month-old infant sleeping with his arms raised over his head.

"Today is my dad's birthday," she wrote of her late father, Robert Kardashian. "I know there's nothing more in the world he would have wanted than to meet his grandchildren. So I wanted to share this pic of Saint with you all."

Kardashian is the daughter of Kris Jenner and Robert Kardashian, who died of cancer at age 59 in 2003. The reality star shared a photo of her dad and a birthday message in an earlier post.

"Happy birthday dad!" she wrote. "I can't believe you would have been 72 today. So much has gone on in our lives since you've been gone, and I know you have been my guardian angel seeing everything unfold! I love you and miss you so much!"

Kardashian and husband Kanye West welcomed Saint on Dec. 5 and are also parents to 2-year-old daughter North West. The reality star experienced a difficult, high-risk second pregnancy, as seen on Sunday's episode of "Keeping Up with the Kardashians."

Robert Kardashian was known for serving on O.J. Simpson's defense team, as dramatized on "American Crime Story: The People vs. O.J. Simpson." David Schwimmer plays the late defense attorney on the FX series, which airs Tuesdays at 10 p.m. ET.