Denied: Sienna Miller Not Engaged to Rhys Ifans

Hold off on the "congratulations."

Sienna Miller has shot down swirling reports that she's engaged to her beau Rhys Ifans.

"The story is completely untrue," the actress' rep states.

According to The Daily Mirror, the 39-year-old British actor reportedly proposed to Sienna on her 26th birthday back in December which she accepted — after denying him twice before.

The couple, who make their home in London, have been dating for a year.