The one-year-old koala helped Gabe Baker propose to his girlfriend Rowan Henderson as they visited Symbio Wildlife Park in Australia from their home in California.
Baker decided to pop the question while Henderson completed the one thing on her Australia bucket list: meeting Imogen.
He contacted zoo owner John Radnidge to ask if his girlfriend could pose with Imogen for a picture - knowing that he'd also use the special moment to ask her to marry him.
After Baker got down on one knee, Henderson said yes and threw her arms around her husband-to-be.
"Congratulations to Gabe Baker and his new fiance, Rowan Henderson who came all the way out to Australia from California, and had Imogen be the ring bearer for the ultimate marriage proposal," Symbio Wildlife Park wrote on YouTube, as it shared a video of the touching moment.
The couple is yet to set a wedding date.
Imogen stole the hearts of millions back in June when she poked her head out of her mom's pouch at the Symbio Wildlife Park. Days later, the mother of an even smaller koala, Harry, passed away from leukemia - leaving her tiny baby orphaned.
After consulting with experts, the Wildlife Park decided to hand-rear Imogen and put Harry into Kelly’s pouch instead.
Symbio Wildlife Park curator Kylie Elliot and general manager Matt Radnidge put their lives on hold to look after Imogen - taking her everywhere with them.
Elliot told INSIDE EDITION: "Hand raising Imogen has been the most challenging and rewarding thing we have ever achieved. It hasn’t been an easy journey raising a Joey with nocturnal habits and sharp claws - I definitely have a new respect for Koala mothers!"
Imogen recently celebrated her first birthday with an adorable photo shoot. For more updates, check out the zoo's Facebook page here.