Knoxville — Things got a little wilder than usual Friday morning at Zoo Knoxville's Chimp Ridge.
Orange and white decorations hung on one side, while purple draped the other end of the enclosure, though it didn't take long for things to get a little mixed up when the birthday boy and girl arrived!
George, who was born at Zoo Knoxville on July 19, 2008, shared a birthday celebration with Bo, who turned 38 on Friday.
It was quite the party, with the chimp celebrants literally swinging from the ceiling from time to time!
Zoo Knoxville chimps celebrate birthdays
They enjoyed birthday cake and cookies, and ripping apart the decorations.
Zoo keepers believe the chimps knew that today was special.
"They do get extra special stuff on their birthday, so they get extra excited. I definitely think they know there's something special going on and you can hear them communicating with the chimps outside as well. they were like, 'oh my gosh I'm getting something good today,'" said great ape keeper KateLyn Miller.