Kim Kardashian Keeps Christmas Card Celebration Going With Adorable 'Day 3' Photo of Reign Disick

Kim Kardashian attends Bumble Bizz Los Angeles Launch Dinner At Nobu Malibu
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The reality star took to social media to post the next installment in her 25 Days of Christmas family photo series.

Kim Kardashian West is keeping her 25 Days of Christmas celebration going with another adorable family photo.

After kicking off the series of photos with a pic of her 1-year-old son, Saint, and following that up with a sweet photo of her 4-year-old daughter, North, Kim looked to her sister's kids to be the next subjects of the series.

Kourtney Kardashian's 2-year-old son, Reign, posed shirtless with his long hair cascading over his face for Sunday's festive photo.

"DAY 3" Kim captioned the snapshot -- taken by photographer Eli Russell Linnetz, who has directed and worked with Kanye West on several of his music videos.

The only Kardashian kids left to reveal in the holiday series are Reign's 5-year-old sister, Penelope, and 7-year-old brother, Mason, as well as Rob Kardashian's 1-year-old daughter, Dream.

Some fans, however, are speculating that the series of family snapshots are building up to Kim and Kanye revealing the birth (and possibly first photos) of their third baby. Their forthcoming addition to the family -- who is being carried by a surrogate -- is rumored to be due this month.

Kim told ET last month that she was in charge of the family's Christmas card this year, and that she'll "never do it again."

"Just to wrangle ever single family member was so exhausting," she said. "I thought it would be really easy. It was really tough. But it'll be a good one this year, I think our best yet."

Check out the video below to hear more.