The 24-year-old actress confirmed her engagement to Wladimir Klitschko Wednesday on US TV show Live! with Kelly and Michael.
Although Hayden claimed she and her fiancé haven't started planning their wedding, sources tell E! Online she is now “on the wedding fast track”.
According to the website she “has been interviewing different wedding planners” and “is planning to get married around the holidays”.
It is currently unknown where the couple are planning to host their nuptials.
Rumours of Hayden’s engagement to heavyweight boxer Wladimir, 37, began circulating in March amid claims he secretly popped the question.
Since April, Hayden has been sporting a giant rock on her finger, which the outlet reports is a “six-carat, emerald-cut diamond engagement ring, [that] has an estimated value of around $500,000”.
Hayden and Wladimir began dating in 2009 but split two years later. The couple reignited their relationship in January.
Hayden has previously discussed her desire to settle down and have a family.
The blonde star told British newspaper The Telegraph she is "built" to be a mother and raising a child is one of her main life goals.
Hayden dated American football star Scotty McKnight following her break-up from Wladimir, but they went their separate ways towards the end of 2012.
She was also previously involved with her Heroes costar Milo Ventimiglia and British TV personality Steve Jones.