Model and former Miss Universe Australia Jesinta Campbell and Sydney Swans star Lance "Buddy" Franklin are engaged.

Campbell, 23, announced the news to her Instagram followers on Sunday afternoon with a photo of the pair embracing and enjoying a flute of champagne.

"I cannot wait to spend the rest of my life with you. There are no words to describe how happy we are," she wrote.

But there was one word, or least a hashtag, "#ENGAGED," she signed off.