The cake was out at Bundaberg's Alexandra Park Zoo this week, as one of its cotton-top tamarins celebrated a milestone birthday.
Solita turned 24 on Sunday, making her the 'oldest of her kind in Australia', according to a post to the Bundaberg Regional Council Facebook page.
"While that may seem a sprightly age for a human, in monkey years it puts the old girl in at great-grandma status," the post says.
"The pint-sized mammal was born in America and spent much of her early life travelling back and forth to Canada before heading to Perth Zoo for a breeding program.
"She was then moved to Alexandra Park Zoo alongside her daughter Turbo in 2015 as part of ongoing conservation efforts."
Alexandra Park Zoo marked the celebrations with some fruit cake.
Image: Facebook / Bundaberg Regional Council