Call in Rafiki and cue up "Circle of Life."
Lion was born in late October and has two older half-brothers: O'Loughlin's 15-year-old son, Saxon, and Jones' 3-year-old boy, Spike.
Jones, a competitive surfer turned model, first went public with O'Loughlin in January at the 9th Annual G'Day USA Los Angeles Black Tie Gala in Hollywood. E! News was the first to report in August that they were expecting.
We can't wait to meet little Lion O'Loughlin!