Editors at America's Star magazine ran with the engagement news this week (09May12), claiming Hedlund popped the question to the Spider-Man beauty at her 30th birthday party at Los Angeles hotspot Chateau Marmont on 30 April (12).
A source said, "(He) asked her to marry him. She thought he was kidding because there was no engagement ring - but he told her one would be coming soon, and they kissed passionately for about a minute. Everyone applauded!"
But a spokesperson for the TRON: Legacy hunk has dismissed the rumours, telling WENN, "(The report is) so not true."
Hedlund and Dunst met on the set of On the Road, the upcoming big screen adaptation of the Jack Kerouac book, and went public with their romance at the Sundance Film Festival in Utah in January (12).