Olivia Culpo and Christian McCaffrey are getting in some quality time before their little bundle of joy makes its big debut to the world … taking a vacation after announcing the pregnancy!!

The Sports Illustrated Swimsuit cover model — who confirmed on Monday she’s got a baby on the way — is documenting the married couple’s road trip from Charlotte to Tennessee … and her growing belly was on full display.

The pair stuffed their Cadillac SUV and brought along their adorable pup, Oliver Sprinkles, for the occasion … but their four-legged friend elected to get some Zs as they headed to their destination.

The getaway appears to be pretty chill — vibe and temperature-wise — as the two are bundled up as they hang around in the outdoors.

As we previously reported, Culpo and McCaffrey are taking the next step in their marriage … with Olivia announcing motherhood as the upcoming chapter of their story with an elegant photoshoot.

It’s their last offseason as a family of three … and it’s clear they’re making the most of it before their life becomes dirty diapers and sleepless nights.