Olivia Culpo's got a bun in the oven -- the model and Christian McCaffrey are expecting their first child together!!
The 2020 Sports Illustrated Swimsuit cover girl broke the news on Instagram Monday morning ... sharing a stunning pregnancy photoshoot with the caption, "next chapter, motherhood ud83eudd0d."
She was also spotted hitting a café in Encino recently ... and her pregnant belly was visible through her jacket.