“Life was so simple back then, but life is so good today,” the 69-year-old Olympian captioned Instagram post on Satuday. “Happy birthday to my little baby @kyliejenner.”
However, the photo was definitely not a photo of Kylie, but of Kendall Jenner.
Caitlyn quickly deleted the post after realizing the mistakes. She switched the photo added a much simpler message saying, “Happy birthday @kyliejenner.”
She also included a shot with both daughters, so at least she eliminated the 50/50 chance of messing up again.
Once Caitlyn change the photo fans were quick to comment, letting her know they noticed mistaken identity.
"I knew that was Kendall I thought I was trippin," one fan wrote.
To be fair ... EVERYONE looks a lot different these days.
Kylie is currently celebrating her 22nd birthday on a yacht in Italy with friends and family.
Travis Scott, daughter Stormi, Kris Jenner, Sofia Richie and Scott Disick are all there with the make-up mogul.
The "Keeping up With The Kardshians" star shared the festivities on Instagram posing in front of a floral arrangement fashioned into the shape, “22,” while enjoying monking cocktails.
They also dined out at one of Capri's most famous restaurants.
Caitlyn Jenner was among the guests when Kylie turned 21 last year with an all-out bash at Delilah restaurant in West Hollywood.