Kate Hudson may have secretly tied the knot.

Her mother Goldie Hawn, 66, seems to have let slip to London's Evening Standard magazine that her daughter had already "married" fianc Matthew Bingham.

The Almost Famous star and her rocker beau got engaged in January 2011 and welcomed son Bingham seven months ago.

"My kids are fantastic with their children," Goldie told the publication. "They have an amazing parental ethic and I'm very proud of them for that."

"When my daughter Kate married an English rock star it didn't worry me. All that matters is that the relationship is a good one. What people do is not necessarily who they are.

"Kate hasn't picked up too many English mannerisms, she's held on to her identity quite well."

There had been reports that Kate planned to tie the knot this summer after saying last year that she was in no rush to get down the aisle.

"One thing at a time," she told Elle magazine. "We'll say hello to our new one and enjoy that for a while."

Kate also has a seven-year-old son, Ryder, from her marriage to Black Crowes frontman Chris Robinson.