The Mysterious Girl singer tweeted a photo of his medical student fiancé Emily MacDonagh smiling excitedly as she posed in front of a lion.
"This has to be a first :))," he wrote alongside the image. "A "lelfie" Ems doing a selfie with a lion. Zoom in and check out that bad boy."
Emily MacDonagh posing with a lion
Peter and his family jetted off on their African adventure earlier this week.
On Wednesday the Australian singer shared some snaps of his son Junior, nine, and daughter Princess, seven, as they enjoyed their exotic getaway.
Peter joked about the youngsters joining a sports team as he snapped them posing with a group of locals following a football game.
"J, P and the new football team lol:)))" he captioned a shot of the 15-strong group taking a momentary break from their match. "Junior in his element playing footie with the locals," he wrote alongside another.
While Peter didn't specify which country they are in, his photos show stunning views of white sand and a vast body of water.
Peter’s children are from his relationship with ex-wife Katie Price to whom he was married from 2005 to 2009. Peter and Emily are parents to seven-month-old daughter Amelia.