Musician and producer Mark, 35, has been dating the 26-year-old French beauty since 2009 and even got her to star in the video for his recent single The Bike Song.
Ronson was previously engaged to actress Rashida Jones, daughter of music legend Quincy Jones, in 2003 and also briefly dated Daisy Lowe in 2008.
Ronson’s engagement follows a spate of celebrity engagements of late.
